Best thermos for keeping hot drinks warm and cold drinks cool

Taking the top spot is the brand we all think about when it comes to thermoses and flasks, Thermos. The Thermos Stainless King Flask's vacuum insulation technology offers maximum temperature retention so it'll keep your tea, coffee and hot chocolate nice and hot for 24 hours and your water or squash cold for 24 hours too. If you're using this Thermos for hot drinks, you won't need to worry about scalding your hands with it as it's designed to stay cool to the touch with hot liquids inside.

For the quality of the flask, customers across the board felt the handle could be better as it's a little bit flimsy. However, with over 21,000 reviews and an average star rating of 4.7, it's loved for being easy to use, hold and clean, as well as being leakproof. Our tester appreciated its large 1.2-litre capacity and felt it did keep drinks hot or cold for as long as the brand has stated.

Alice, 59 years old, says: "My new flask with its amazing twist and pour stopper is perfect for my days out, whether camping with the grandchildren or strolling in the park on my own, I can pour my drink without having to remove the whole lid. I love that it keeps my drink hot for 24 hours and the thermos is always cool on the outside to touch, it's also great in the summer for cold drinks which also stay cool for 24 hours. Its 1.2L capacity means it's great for my picnic days out or my stroll to the park it's light to carry with a great fold-away handle to pack into my picnic basket and to hold while pouring. And the anti-slip base means it stays put."

Regardless of whether you're tackling a walking trail in the summer or heading off on your morning commute in the winter, the Stanley Adventure Stainless Steel Thermos is made for keeping hot and cold drinks warm or cool wherever you go. It's designed with a leak-resistant lid so you can pop it in your bag and be safe in the knowledge you're not going to end up with a pool of liquid collecting in the bottom of it when you reach for it later on.

When it comes to feedback from real-life customers, the Stanley Adventure Stainless Steel Thermos is described as being solid and well-made and that it does an excellent job at keeping drinks warm for a long period of time. One reviewer even said their tea was still hot even 24 hours later after being kept inside. There is some confusion about the dishwasher-safe elements of this thermos as the product listing describes the whole thing as being dishwasher safe, however, a reviewer found that only the lid and stopper inside are, so that's just something to be mindful of when it comes to cleaning.

Made with kitchen-grade stainless steel, the YETI Rambler is built to last as it's puncture and rust-resistant. As it's more robust compared to some on the market, dents and scratches shouldn't show up as easily so, if consider yourself to have butterfingers, it won't damage easily if you accidentally drop it. Combine this with the leak-proof lid, double-wall vacuum insulation to keep drinks the temperature they should be and 'no sweat' design that stops condensation from building up on the outside, you've got yourself a good all-round drinks flask.

The leakproof lid of this thermos gets a huge thumbs-up from customers. In fact, on just that factor alone, customers rated it 4.9 stars out of 5. They also appreciated that the thermos combines style and functionality so you're not just getting a one that looks good but it does a good job too. Options are mixed on the overall value, with some thinking it's expensive for what it is, but we think it's worth splashing out when you look at the overall quality you're getting for the money.

Pretty meets practicality with the Chilly’s Liberty Tropical Trail cup. Made in collaboration with iconic British retailer Liberty, it features a stunning tropical print so you can drink your cup of Joe with style each day. The rubber base at the bottom of the cup helps with the stability of the cup if it accidentally gets knocked and it also means you can put it down silently compared to other thermoses where you might hear the clunk of the stainless steel hit the table. It also has an antimicrobial drinking surface which is designed to help keep the nasty bacteria away in between cleans.

The thing that lets this thermos down for us is that it only keeps drinks hot for up to four hours, which isn't very long compared to others on our list. You would still be able to take your morning coffee with you to enjoy on the go and it stay warm for the duration of your commute though.

Rushing around in the morning and don't have time to fit in your much-needed tea or coffee before you leave the house? The Hapi Flask is perfect for taking your favourite beverage with you on the go as it's made in a cupholder-friendly size. Its features include a push button opening and a safety lock so you'll have peace of mind that it's not going to spill liquid everywhere when you're not drinking from it.

We, as well as customers online, love that it comes in 350ml and 500ml capacities and a choice of eight colours so you can stay stylish as well as hydrated. As well as loving how it looks, customers rated the Hapi Flask highly for its overall quality and appreciated that it arrived well-packaged.

The JUMKEET Double Walled Vacuum Cup Flask boasts a one-hand-operated lid so even when you've got one hand full, you can flip the switch and sip while you carry on with whatever task you're doing. It has a curved design so it fits nicely and comfortably in your hand and when it comes to cleaning it up, it's very easy to disassemble so you can scrub each individual part.

You may not have heard of the brand JUMKEET before, but this thermos comes highly rated on Amazon with over 4,000 reviews and an average star rating of 4.3. Options are mixed when it comes to how leakproof it is. Some people found it did leak water and coffee when it was placed in their bag whereas other have found it to be 100 per cent leak proof.

Featuring a carry handle and an insulated cap that doubles as a cup, the YJH Double Walled Vacuum Insulated Bottle is a great choice for drinking hot and cold beverages on the go. It can also be used for soup if needed. When it comes to keeping it clean and free from bacteria that can lurk on uncleaned water bottles and thermoses, it comes with a cleaning brush with a long handle so you can get into all the nooks and crannies in the lid and cup as well as reach down inside to the bottom of the thermos.

Opinions are mixed on how leaky it is. Some found it did leak the drinks out but others have had no issues with it. Some reviewers also wished the cup was a little bigger as they felt it was a bit small compared to the overall capacity but that just means you'll feel like you're getting more cups of tea and coffee out of it in the long run.

Using a reusable thermos rather than single-use bottles is good for the planet but if you want a thermos that's great for the planet, consider the Ocean Bottle Brew Flask. It’s made from 90 per cent recycled stainless steel to start with but for every Ocean Bottle bought, the company funds the collection of 1,000 ocean-bound plastic bottles so you can savour every sip of your tea and coffee guilt-free. The lid is not only leakproof but also has a 360 design so you can take a swig of your drink from any angle.

As well as the fact it's environmentally friendly, customers on Trustpilot liked that the Brew Flask is aesthetically pleasing while keeping their drinks nice and hot. Some reviewers thought the capacity could be bigger and we agree as it's one of the smaller capacity thermoses on our list. Some also found that it was hard to tell when the lid was closed and they experienced some leakage when it wasn't shut properly but when the lid is fully shut, it is completely leakproof.

A new addition to the Thermos family, the Icon Bottle with Spout makes it super easy to stay hydrated wherever you are as it has a rapid flow spout so you can just simply sip and go. As you'd expect from a Thermos product, it keeps liquids cool inside for up to 24 hours. As well as being easy to drink, it’s easy to carry as it has a large built-in carry handle so you can hold it in your hand and take a swig when needed or pop it in your bag.

If you do plan on putting it in your bag, you may be worried about it leaking all over the place but as our tester found, the safety clip on the lid ensures you can chuck it in with no spills. Having a 1.9-litre capacity means you’ll never be short of having water to drink but having the Thermos filled to full capacity will make it quite heavy so that’s something to bear in mind if you’ve got limited arm strength.

Alice, 59 years old, says: Thermos always was a trusted name to my family as a child on our days out. Today as a mother and grandmother myself Thermos has not disappointed. The Thermos Icon series bottle is a wonderful addition to my collection. Its 1.9L capacity holds my daily water intake so I never forget how much I've drank and it keeps it cold for 24 hours with its insulated layer. I love that it has an easy-to-open spout and its rapid flow makes it easy to drink on the go, then a quick clip of the safety clip and into my bag with no spills. The anti-slip base is great too which means my clumsy fingers won't knock it over. The comfy easy grip handle makes it easy to hold, and at the end of the day I just pop it in to the dishwasher ready for the next day."