Best Thermos Flasks & Vacuum Food Flasks

Best Thermos Flasks & Vacuum Food Flasks

The Thermos Flask is simply a picnic staple, and a must-have for any dining out experience, whether it be picnics, camping or even at festivals.

Our Best Thermos Flasks and Vacuum Flasks can keep your food and drink hot or cold.  Moreover, these days you’re not limited to drinks or soup either – there are some fantastic picnic food flasks on the market too. These are also great for popping in your lunch bag with lovely home-cooked food (or leftovers!).

Our various Vacuum flasks are also great for road trips – whether you need a quick cuppa as a pick-me-up or want to keep water or juice cool on a long summer journey.

There’s a huge range of Thermos Flasks on the market, from individual-sized models to ones big enough to keep soup toasty for the whole family.  In addition, there are flasks to suit every budget. I have included a few of the budget Thermos Flasks, but only ones that I feel work very well. 

If I’m honest, investing more in a flask (and a good water bottle, and I recommend the hydro flask) is worthwhile. It will keep your food warmer for longer and last you for years – as I can testify to with my good old Stanley flask, my picnic companion since before Theia was born!

Here are some of our absolute favourites below, from old favourites like Stanley and Thermos to their more modern competitors. Also, check out our comprehensive thermos flask buyers guide before you purchase.

Best Thermos Flasks & Vacuum Food Flasks

Our Best Thermos & Vacuum Food Flasks for 2023

ONEISALL 2L Flask,Insulated Stainless Steel Bottle- Thermo Flask with...
BEST XTRA LARGE THERMOS FLASK (2L): Keeps drinks hot for upto 12 hours & cold upto 24 hours. Cool touch walls, carry handle and leakproof, Steel inner so shatterproof, Easy press pour lid for no spills

Stanley Classic Legendary Thermal Flask 1L - Keeps Hot Or Cold For 24 Hours...
BEST 1L THERMOS FLASK: I choose this Stanley Food Flask because, honestly, they are built for a lifetime. From his uni years, my dad is still going strong on family outings! And that makes it over 50 years old. Stainless steel does not rust and comes with an easy pour and cup. Not fancy, but it last!

Sale
Thermos Stainless King Food Flask, 710ml Capacity - Sleek Multi- Purpose...
BEST THERMOS FOOD FLASK: Keep your food hot on the go with the Thermos King Food Flask. This easy clean soup flask will keep soup/food hot for 14 hours and cool for 24 Hours. The lid can be a dish or cup. Cool touch walls and stainless steel so shatterproof

Sale
Thermos - Charcoal Ultimate Flask (900ml), Reusable Insulated Stainless...
BEST SMALL THERMOS FLASK: Holds 500ml of liquid, so it's an individual vacuum flask/ coffee flask. Cool wall & two-part stopper for an easy pour. Stainless steel and lightweight - perfect for taking up a mountain or trekking to work!

Sale
Thermos Stainless King Matt Black Travel Mug (470ml), Reusable Insulated...
BEST THERMOS COFFEE MUG: I choose this because they are so robust, our last years. I love the handle for easy carry & sip on the go. Keeps coffee warm for 7 hours (as if my coffees last that long!). Fits in most car cup holders. Drinklock sealing lid for easy sup and even has a tea bag holder!

I recommend these Picnic Thermos Flasks and Food Flasks as the UK’s best based on the following criteria:

  • Heat retention – how long will they keep my food or coffee at the right temperature?
  • Build quality – will it stand up to being dropped or having the odd knock? Is there any leakage?
  • Durability – how long will it last? Is it weatherproof, or will it rust? 
  • Cost – how much value am I getting for my money?
  • Added extras like a carry handle, case or spoon for a food flask

Best Xtra Large Thermos Flask (2L and bigger)

Discover the best extra-large 2L Thermos flasks to keep your beverages hot or cold for extended periods.

These high-capacity flasks are perfect for family outings, long hikes, or camping trips, ensuring everyone stays hydrated and refreshed. Each flask features superior insulation technology, robust construction, and user-friendly designs for seamless operation.

Explore our curated collection and find the perfect 2L to 5L extra large Thermos flask that meets your capacity, durability, and temperature retention needs. Experience the convenience of carrying more of your favourite drinks wherever you go with these exceptional thermos picnic flasks.

Bestseller No. 1 Hampton & Stewart Large Stainless Steel Flask Hot & Cold Tea Drink Thermos Vacuum Bottle Handle (Silver, 2.0L)
Bestseller No. 2 Comvi Flask for Hot Drink - 2.5L Vacuum Flasks for Hot and Cold Drinks (24hrs Hot & 36 hrs Cold) BPA Free Double Wall 304 Stainless Steel Flask - Insulated Coffee Flask - Large Water Bottle - Black
SaleBestseller No. 3 Thermos Stainless King 1.2L Multi- Purpose Thermos Flask - Original-Style Flask can be used as Travel Mug or Insulated Water Bottle for Daily Commute & Weekend Adventures – Red, 5- Year Warranty
Bestseller No. 4 Extra Large Tereré Flask - 2L Stainless Steel Thermal Flask with Sturdy Handle and Twist-Pour Stopper Perfect for Tereré and Yerba Mate | Gaucho Bruno
SaleBestseller No. 5 LOKPESCO Large Coffee Flask for Hot and Cold Drinks 2L/70oz, Stainless Steel Vacuum Insulated Flask with 2 Cups, Oversized Hot Water Bottles for Travel/Hiking/Camping, Keep Hot 24hours(GN, 2L)
SaleBestseller No. 6 Hangrow Vacuum Insulated Bottle, Large Capacity Stainless Steel Vacuum Insulated Flask for Hot and Cold Drinks, Travel Flask Drink Flasks Food Soup Flask (Black, 2000ml)
Bestseller No. 7 3L/5L Pump Action Air Pot Flask with Vacuum Insulated, Safety Lock & Carry Handle for Drink, Tea & Coffee by Crystals® (3L Air Pot Flask)
Bestseller No. 8 Trebo Insulated Water Bottle 2L, Stainless Steel Water Bottle 2L Metal Bottle with Handle Metal Large Jug Travel Flask with Straw Spout Lid Mug Tumbler Cup with Carry Pouch Keep Cold Hot, Dark Grey
Bestseller No. 9 LOKPESCO Flask for Hot Drink 1.5L, Stainless Steel Flask for Hot and Cold Drinks, Vacuum Insulated Water Bottle, Coffee Thermo Flask, Double Wall Large Travel Flask for Outdoor Home Office (Green)
Bestseller No. 10 Flask for Hot Drink, 304 Stainless Steel Flasks for Hot and Cold Drinks with Coffee Lid and Handle, 2.0 Liter Large Capacity Hot Water Flask

Best 1L Thermos Flask

Discover our curated selection of the best 1L thermos flasks that ensure your beverages maintain their optimal temperature, whether hot or cold.

Each flask combines superior insulation technology with durable construction and user-friendly design. Ideal for outdoor adventures, lengthy road trips, or daily office use, these flasks stand up to the rigours of everyday life.

With various styles and features, finding the perfect 1L thermos flask that fits your needs has never been easier. Stay refreshed and hydrated, no matter where your day takes you.

SaleBestseller No. 1 Thermos Stainless Steel Flask, Hammertone Blue, 1 l
Bestseller No. 2 Milton Vacuum Flask for Hot Drink 1 Litre (34 oz), Stainless Steel Double Walled Insulated Water Bottle for 24 Hour Hot and Cold Drinks with Cover, Leak Proof, BPA Free, Thermosteel Flip Lid 1000 ml
Bestseller No. 3 THERMOcafè by THERMOS Stainless Steel Flask, Multi-colour, 1.0 Litre
Bestseller No. 4 Thermos Mondial Flask, 1L
Bestseller No. 5 Bargain Factory Water Flask, Double Walled Vacuum Insulated Flask 1l, Leakproof 24 Hours Hot and Cold Water Bottle, Durable Stainless-Steel Interior and Exterior, Silver
SaleBestseller No. 6 Thermos - Charcoal Ultimate Flask (900ml), Reusable Insulated Stainless Steel Thermal Coffee Cup for Hot or Cold Drinks, Vacuum Sealed Water Flask with a Leak-Proof Lid, 24hr Hot/24hr Cold
Bestseller No. 7 Thermos Stainless Steel Flask, Hammertone Grey, 1.0 L
Bestseller No. 8 Fine Elements Fine Elements 1.0 Litre Vacuum Flask Set Steel with Push Button Pourer, Silver
SaleBestseller No. 9 Thermos Stainless King 1.2L Multi- Purpose Thermos Flask - Original-Style Flask can be used as Travel Mug or Insulated Water Bottle for Daily Commute & Weekend Adventures – Red, 5- Year Warranty
Bestseller No. 10 1L Stainless Steel Flask - Keeps Drinks Hot & Cold, with Carry Case, Vacuum Insulated Thermos, Perfect for Sports, Outdoor, Hiking, Travel, Office, Leakproof Lid Serves As A Cup, 1000ml

Best Thermos Food Flask

Discover the finest selection of thermos food flasks designed to keep your meals warm or cold for extended periods.

Whether you’re packing soup for lunch, fresh fruit for a picnic, or hot chocolate for a winter hike, these flasks offer unparalleled performance. Crafted with superior insulation technology, they ensure your food remains at the desired temperature.

From compact designs for light travel to larger options for family outings, our collection caters to all your needs. Experience the blend of convenience and efficiency with our top-rated thermos food flasks.

SaleBestseller No. 1 Thermos Stainless King Food Flask, 470ml Capacity - Sleek Multi- Purpose Flask for Daily Food Prep - Durable Stainless Steel with Classic Duck Egg Finish - Ideal for On-the-Go Meals & Drinks
Bestseller No. 2 Moon Insulated Food Flask - Food Jar & Soup Container, Thermal Food Container to Keep Your Meal Hot For Longer, Free Folding Spoon, Leakproof, UK Company (500ml Black)
Bestseller No. 3 Kimyou food flask 730 ml | Premium Stainless Steel Vacuum Insulated thermal food container | food flasks for hot food | soup flask | soup containers | vacuum flasks with Bag, brush & spoon
SaleBestseller No. 4 WayEee Food Flask, Food Flask for Hot Food Stainless Steel Food Jar with Folding Spoon-450ml (Blue)
Bestseller No. 5 Blockhütte Insulated Food Flasks for Hot Food I 530ml I Leakproof Stainless Steel Thermal Flask, Hot Food Container with Spoon, Lunch Box BPA-Free - Ideal for Kids, Adults, Travel, Camping
SaleBestseller No. 6 TranRantic Food Flask for Hot Food, 500ML Stainless Steel Insulated Food Container, Leakproof Thermos Soup Flask with Foldable Fork and Spoon, Food thermos for Hot and Cold Meals (Red)
SaleBestseller No. 7 Thermos Curved Food Flask with Spoon, Stainless Steel, 400 ml
SaleBestseller No. 8 Dreamhigh® Thermal Food Container, 800 ml, Stainless Steel Food Container, Thermos Flask, Leak-Proof, incl. Spoon, 12 Hours Hot, 12 Hours Cold
Bestseller No. 9 520ml Insulated Food Flasks For Hot Food – Double-Wall Stainless Steel Hot Food Flask With Spoon – Thermal Lunch Box keeps Meals Drinks Hot or Cold for 6 Hours – Leakproof Soup Containers (Eucalyptus)
SaleBestseller No. 10 Stanley Classic Legendary Food Jar 0.4L With Spork - Keeps Cold For 7 Hours - BPA-Free Stainless Steel Soup Flask - Leakproof - Dishwasher Safe - Hammertone Green

Best Individual Vacuum Flask

Discover the best individual vacuum flasks that combine convenience, style, and thermal efficiency. These flasks are designed to fit seamlessly into your daily routine, keeping your beverages at the perfect temperature while on the go.

From sleek designs to robust outdoor options, each flask offers unique features that cater to various needs. Whether you’re a coffee connoisseur, a tea enthusiast, or a lover of cold drinks, our carefully curated selection of top vacuum flasks will meet your performance, durability, and style expectations.

Let’s dive in and explore the finest individual vacuum flasks available today

SaleBestseller No. 1 Contigo Byron Snapseal Travel Mug | Stainless Steel Thermal Mug | Vacuum Flask | Leakproof Tumbler | Coffee to Go Mug with BPA Free Easy-Clean Lid | Chardonnay | 470 ml
Bestseller No. 2 Fine Elements Fine Elements 1.0 Litre Vacuum Flask Set Steel with Push Button Pourer, Silver
Bestseller No. 3 Thermos 181114 ThermoCafé Stainless Steel Flask, Multicolour, 0.35 L
Bestseller No. 4 New 0.5L Stainless Steel HOT N Cold Vacuum Thermos Flask Tea Coffee + CASE | Durable Long Lasting | Travel Camping Hiking | Easy Clean
Bestseller No. 5 Andes 1 Litre Stainless Steel Insulated Vacuum Travel Tea/Coffee Thermos Flask Bottle
Bestseller No. 6 SHO Food Flask - Vacuum Insulated, Double Walled Stainless Steel Food Flask & Food Container - 10 Hours Hot & 20 Hours Cold - 530ml 800ml - BPA Free (Jet Black, 530ml)
Bestseller No. 7 Pioneer Flasks SVF500 Insulated Vacuum 500ml Travel Flask, 18/10 Stainless Steel – Keeps Drinks Hot for 8 Hours, 0.5L
Bestseller No. 8 Exllena Small Flask 400ml Made of 304 Stainless Steel, Double Wall Vacuum Insulation for Hot&Cold Drinks, Mini Flask with Carry Handle - 100% Leakproof (Orange)
Bestseller No. 9 Portable Stylish Vacuum Flask,Fresh Stainless Steel Vacuum Flask,Outdoor Sports Vacuum Flask,Suitable for Men and Women,Children and Adults,Outdoor,Office,350ml (Black)
Bestseller No. 10 Proworks Performance Stainless Steel Sports Water Bottle | Double Insulated Vacuum Flask for 12 Hours Hot & 24 Hours Cold Drinks - Great for Home, Work, Gym & Travel - 1L - BPA Free – All Black

Best Thermos Cup

A reliable thermos cup can make all the difference in our fast-paced, on-the-go world. Whether you’re a coffee enthusiast needing your hot brew throughout the day, a tea lover savouring your infusion, or a fitness enthusiast staying hydrated, the right thermos cup is key.

We have curated a selection of the best thermos cups, considering factors like heat/cold retention, durability, leak-proof design, and overall style.

These thermos cups meet not only functionality but also aesthetic appeal. So, explore our top picks to ensure your beverages stay at their optimal temperature, any time, any place.

SaleBestseller No. 1 Thermos Stainless King Gun Metal Travel Mug (470ml), Reusable Insulated Stainless Steel Coffee Cup for Hot or Cold Drinks, Vacuum Sealed Water Flask with a Leak-Proof Lid, 7hr Hot/18hr
SaleBestseller No. 2 Thermos - Charcoal Ultimate Flask (900ml), Reusable Insulated Stainless Steel Thermal Coffee Cup for Hot or Cold Drinks, Vacuum Sealed Water Flask with a Leak-Proof Lid, 24hr Hot/24hr Cold
Bestseller No. 3 JUMKEET Double Walled Vacuum Cup Flask Thermo,Stainless Steel Insulated Water Bottle | Flask for Hot and Cold Drinks Cup Travel Coffee Mug, Sports Water Bottle (A-Black)
SaleBestseller No. 4 THERMOcafè by Thermos 420 ml Plastic and Stainless Steel Soft Touch Travel Mug, Black
Bestseller No. 5 LARS NYSØM Thermo Coffee Mug-to-go with Strap 17oz | Travel Mug 0.5 Liter with Insulation | Leak Proof Stainless Steel Thermal Tumbler for Coffee and Tea to Go (Almond Beige, 500ml)
Bestseller No. 6 Travel Mug, Insulated Coffee Cup with Leakproof Lid, Reusable Coffee Cup Travel Mug for Hot Drink, Vacuum Stainless Steel Water Bottle, Portable Coffee Mug for Car Outdoor Picnic Office (Black)
Bestseller No. 7 XIXIAMI Travel Mug 400ml Insulated Coffee Cup for Hot & Cold Drinks Car Thermos Mug with Straws & Cleaning Brush Leakproof Thermal Stainless Steel Tumbler Best Birthday Gift-Dark Green
SaleBestseller No. 8 Thermos - Teal Direct Drink Flask (470ml) Reusable Insulated Stainless Steel Thermal Coffee Cup for Hot or Cold Drinks, Vacuum Sealed Water Flask with a Leak-Proof Lid, 10hr Hot/24hr Cold
SaleBestseller No. 9 Philorn Pink Coffee Tumbler - 12 OZ Insulated Coffee Mug with Lid, Leak Proof Thermo Cup for Hot and Iced Drinks, Stainless Steel Vacuum Cup with Double Wall
Bestseller No. 10 Thermos ThermoCafé Desk Mug, Soft Touch Black, 450ml
a thermos food flask will keep soup, chilli and so much more warm for 24 hours

Have you used any of these Thermos Flasks or Food Flasks? Then please leave your review in the comments box below.

Is your favourite Vacuum Flask or Thermos Picnic Flask not on the list? Be sure to let me know in the comments below so I can review it.

Buyers guide to the best Thermos Flasks

Design of a Thermos Flask

Firstly – think about how many people you will use the flask for. If you’re taking it along on a family picnic, by all means, go for a super-sized version, but if you want to take a hot drink along to work in your lunch bag, then an individual flask is a much more sensible option!

If you don’t want to take a cup with you, look for an individual-sized flask with a lid that doubles as a cup or mug! Also, consider the material your flask is made of and ensure it won’t be too difficult to hold (particularly in winter, in case you have gloves). There’s nothing more frustrating than dropping a flask full of the hot drink you’ve been looking forward to – trust me, I’ve been there!

Traditional flasks also can keep soup warm, but you might be better looking at a food flask here – they often come with a built-in/attached spoon and bowl to make eating on the go more convenient! It’s probably a better option if (like me) you like your soup chunky.

Build Quality of a Thermos Flask

The build quality of a Thermos flask or Food Flask is important, as skimping here will mean it’s unlikely to be as effective at retaining heat. You also want to ensure that it’s double-walled and thick enough that you won’t burn your hands picking it up when it’s full!

Make sure the screw top and lid (if applicable) are well-fitting, and there’s no chance of leaking – it shouldn’t require a massive effort to line the lid up and close it properly.

Does it look like it will survive a knock or a drop? It happens, and you don’t want the insulating qualities to be affected here.

The Durability of a Picnic Flask

Is the flask made from a durable enough material? Will it survive being carried in your backpack or picnic basket or banging up against food containers in your lunch tote without damage to the exterior or coating?

Think about where you’ll be using your flask too. For example, if you’re a keen any-weather hiker, you’d be best going for something sturdy and weatherproof over the prettiest design! And make sure it’s made from materials resistant to rust, like stainless steel and aluminium.

Cost of a Thermos Flask

Take my word for it – investing in a quality flask from a reputable brand and spending that little bit is well worth it. The adage ‘Buy Cheap, Pay Dear’ holds here – if you go for a super-budget version, you’ll be wishing you hadn’t when you open your flask to lukewarm coffee at lunchtime! Or when your tomato soup leaks all over your bag…

Think about the PPU – price per use! If you’re using your flask daily for lunch, it works out as really good value if you spend even £30-£35 on it. And think about how much you’ll save on takeaway coffee…

Even if you don’t use your flask every day, statistically, a flask is one of the most heavily used pieces of picnicware! As well as picnics, we commonly take a flask on long drives, walks, hikes and lots more. 

i love a thermos flask on a picnic for keeping food and drinks warm

Frequently Asked Questions About Thermos Flasks

How do Thermos Flasks work?

A thermos flask works by a sealed stopper that stops heat/cold air from getting in, creating a vacuum that stops conduction, and the metal lining between the outer case and the inner chamber stops heat radiating.

This means there’s virtually no way heat can escape from a vacuum or thermos flask, and a hot drink stored inside should stay steaming hot for several hours.

How do I clean a Thermos Flask?

The best way to clean a Thermos Flask is to wash up liquid and warm water, then rinse thoroughly with hot water (getting to your location to taste soap is no fun, trust me!). 

If you want to wash your Vacuum Flask in a dishwasher, check whether your flask is suitable before you begin.

To remove difficult stains, Thermos recommends trying a teaspoon of bicarbonate of soda, and I can safely say that it is an absolute treat on tea and coffee stains!

How long do Thermos Flasks stay Hot?

A Top-quality Thermos flask will stay hot for around 24 hours. Everyday flasks should retain heat for around 12 hours. For cheaper models, it is usually around 6 hours. 

How do I use my thermos flask for the first time?

To use a thermos flask for the first time wash it as above and rinse thoroughly!

Then I’d suggest warming your thermos by filling it with boiling water. Put the lid on and let it sit for a few minutes, then pour the water.

Once warm, quickly add steaming hot food (at or above 74°C or 165°F) or boiling drinks and screw the lid on tightly.

Essential Picnic Items

Before we go, here are quick links to our other picnic essentials.  If you have all these, you are sure of the perfect picnic!

Can you think of another essential picnic item I need to include? If so, drop me a line in the comments.

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Last update on 2025-02-13 / Affiliate links / Images from Amazon Product Advertising API

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