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 Bottle 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!

Thermos 101514 Stainless King Food Flask, Red, 710 ml
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

Thermos Ultimate Series Flask, Charcoal, 900 ml
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!

Thermos 101834 Stainless King Travel Mug, Matt Black, 470 ml
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.

SaleBestseller No. 1 Stanley Classic Legendary Thermos Flask 1.9L - Keeps 32 Hours Hot or Cold - Stainless Steel Flask for Hot Drink - BPA-Free - Dishwasher Safe - Leak-proof Lid Serves As A Cup - Hammertone Green
Bestseller No. 2 Thermos Mondial 1.8 Litre Flask.
SaleBestseller No. 3 Denny International 2L Stainless Steel Vacuum Flask Hot & Cold Tea Coffee Insulated Dispenser Air Pot with Safety Push Button
Bestseller No. 4 Royalford 3L Stainless Steel Airpot, Insulated Vacuum Thermal Flask Jug | Pump Action Airpot, Thermal Coffee Flask | Ideal for Hot & Cold Drinks, Soup | Extra Strong for Catering Travel Commercial
Bestseller No. 5 3L Stainless Steel Airpot - Tea Coffee Vacuum Flask | Handle litre Lightweight Air Pot - for Hot Chocolate, Soup, Hot Drinks - Extra Strong for Catering, Fishing, Camping, Hiking & Commercial
Bestseller No. 6 Insulated Water Bottle 2L, Trebo Metal Bottle with Paracord Handle Wide Mouth Double Wall Stainless Steel Large Sports Bottle Keep Cold 48 Hours Water Bottle with 3 Lids, Indigo Crush
Bestseller No. 7 HEEMBURG 2L Thermal Food flask Lunch Container, Insulated Jar, Stainless Steel Thermo Lunchbox for Meals, Soup, Fruit, for Office and Outdoor Use.
Bestseller No. 8 OKADI Large Flask - 2.5l Stainless Steel Insulated Bottle for Travel with BPA Free Cup - Oversized Vacuum Bottle
Bestseller No. 9 Sandtec Vacuum Travel Insulated Bottle Giant Flask 3L for Hot and Cold Drinks Stainless Steel Oversized Capacity Vacuum Insulated Thermal Reusable Water Bottle Tank for Home Outdoor (Silver, 3L)
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 THERMOcafé by THERMOS Stainless Steel Flask, Hammertone Blue, 1L
Bestseller No. 2 ThermoCafé Stainless Steel Flask, Multi-colour, 1.0 L
Bestseller No. 3 Thermos 190754 Stainless King Flask, Stainless Steel, Matt Black, 1.2 L
SaleBestseller No. 4 Thermos Ultimate Series Flask, Charcoal, 900 ml
Bestseller No. 5 Thermos Light and Compact Flask, Stainless Steel, 1.0 L
SaleBestseller No. 6 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. 7 Thermos Mondial Flask, 1L
Bestseller No. 8 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
Bestseller No. 9 Bargain Factory Water Flask, Double Walled Vacuum Insulated Thermos 1l, Leakproof 24 Hours Hot and Cold Water Bottle, Durable Stainless-Steel Interior and Exterior, Silver
SaleBestseller No. 10 Stanley Classic Legendary Thermos Flask 1.9L - Keeps 32 Hours Hot or Cold - Stainless Steel Flask for Hot Drink - BPA-Free - Dishwasher Safe - Leak-proof Lid Serves As A Cup - Hammertone Green

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.

Bestseller No. 1 Thermos Foogo Food Flask, Pink, 0.29 l
Bestseller No. 2 Prime Horizon Food Flask - 500ml Stainless Steel Vacuum Double Wall Jar with Folding Spoon, Leakproof and BPA Free. Free Insulated Travel Bag with Carabiner and Gift Box (Silver)
SaleBestseller No. 3 Thermos, Stainless King Food Flask, Gun Metal, 470ml
Bestseller No. 4 GOOD FOR YOU - Thermal Food flask for hot food, Soup containers, ideal as a thermal lunch box, soup flask or food warmer lunch box - Stainless Steel insulated hot food flask - Orange
Bestseller No. 5 Thermos Stainless King Food Flask, Midnight Blue, 0.71L, 101423
Bestseller No. 6 Milu® Thermo Food Flask - 300, 440, 450, 650, 800ml - Stainless Steel Insulated Container - Lunchbox - Jar with Spoon for hot and Cold Food (Black, 450ml)
Bestseller No. 7 Thermos Curved Food Flask with Spoon, Stainless Steel, 400 ml
Bestseller No. 8 Thermos 190754 Stainless King Flask, Stainless Steel, Matt Black, 1.2 L
Bestseller No. 9 Marfrand. Kids Food Flask. Food Thermos for Kids. Kids Thermos Food Flask. Baby Food Thermos Container. SS Isolated. Thermos Baby Food. Hot Food Thermos. Dinosaur (350 CC)
Bestseller No. 10 Heemburg Thermal Food Flask Jar Lunch Box Stainless Steel Insulated Double Wall Thermo Container for Meals, Soup or Fruit, for Office and Outdoors

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

Bestseller No. 1 Thermos Thermo Cafe S/S Flask - 181109, Silver, 0.5 Litre
SaleBestseller No. 2 Grunwerg HCF-300G Vacuum Insulated Drinkpod Capsule Flask, Stainless Steel, Green, 300ml
Bestseller No. 3 FAPPEN Double Walled Vacuum Flask Thermo, 500ml Stainless Steel Insulated Water Bottle, Flask for Hot and Cold Drinks, Travel Coffee Mug, Sports Water Bottle, Drinks Cup (Black)
Bestseller No. 4 Fine Elements Fine Elements 1.0 Litre Vacuum Flask Set Steel with Push Button Pourer, Silver
Bestseller No. 5 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)
SaleBestseller No. 6 Vacuum Flask 410ML, NISVDID Reusable Travel Coffee Mug Cup with Lid Insulated Water Bottle Leakproof Thermal Flasks Hot and Cold Drinks for Car Camping Hiking Exercising (410ML/ 13.87OZ, Sky Blue)
Bestseller No. 7 Pioneer Flasks SVF500 Insulated Vacuum 500ml Travel Flask, 18/10 Stainless Steel – Keeps Drinks Hot for 8 Hours, 0.5L
SaleBestseller No. 8 Contigo Byron Snapseal Travel Stainless Steel Thermal vacuum flask, leakproof tumbler, coffee mug with BPA free Easy-Clean Lid, 590 ml, Black
Bestseller No. 9 YINJAM Travel Mug Reusable Insulated Coffee Cups Vacuum Insulation Flasks Stainless Steel Thermal Tumbler for Hot Cold Drinks (Black, 510ml)
Bestseller No. 10 Contigo Byron 2.0 thermal mug, stainless steel insulated mug with Snapseal lock, coffee mug to go, 100% leak proof, dishwasher safe lid, BPA free, keeps drinks warm for up to 6 hours, 470 ml

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 Travel Mug, Gun Metal, 470 ml
SaleBestseller No. 2 Moon 360° Travel Mugs - Leakproof Reusable Coffee Cup - Insulated Thermal Mug for Hot & Cold Drinks - Fits Car Cup Holders, Free Carry Bag (300ml, Black)
Bestseller No. 3 SUNTQ Reusable Coffee Cups Travel - Coffee Travel Mug with Leakproof Lid - Thermal Mug Insulated Cup - Stainless Steel Coffee Travel Cup - for Hot and Cold Drinks, 13oz/380ml, Black
Bestseller No. 4 Contigo Byron Snapseal Travel Mug, Stainless Steel Thermal , vacuum flask, leakproof tumbler, coffee mug with BPA free Easy-Clean Lid, 470 ml, Vivacious, Macaroon
SaleBestseller No. 5 Stanley Classic Legendary Thermos Flask 1.9L - Keeps 32 Hours Hot or Cold - Stainless Steel Flask for Hot Drink - BPA-Free - Dishwasher Safe - Leak-proof Lid Serves As A Cup - Hammertone Green
Bestseller No. 6 WETOWETO 12 oz Insulated Coffee Cup, Spill Proof Travel Coffee Mug, Vacuum Stainless Steel Coffee Tumbler, Coffee Mug with Lid, Portable Thermal Mug, Reusable Travel Coffee Cup(Blue)
SaleBestseller No. 7 Thermos, Stainless Kinf Flask, Gun Metal, 1.2L
SaleBestseller No. 8 Artlive Travel Mug, Coffee Cup 380ml/13oz Insulated & Reusable Travel Cup - Thermal Stainless Steel Eco-Friendly with Leakproof Lid - Hot & Cold Coffee Mug (Black, 380ml)
SaleBestseller No. 9 Contigo Byron 2.0 Snapseal Travel Mug,Stainless Steel Thermal Mug,Vacuum Flask,Leakproof Tumbler,Coffee to Go Mug with Bpa Free Easy-Clean Lid,Licorice,470 Ml
SaleBestseller No. 10 Vacuum Insulated Flask 500ml/16.9oz Stainless Steel Thermo Bottle with Cup for Coffee Water Hot and Cold Drink Flasks.(Green,Single)
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 2024-07-15 / Affiliate links / Images from Amazon Product Advertising API

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