Sandwiched between the inner and outer layers is a void - this vacuum stops the heat from the inner layer reaching the outer layer as heat can only be conducted through particles, whether it’s in the air, through liquids or solids. The cylindrical jar has a wide base with a lid that’s coated in a grippy material that makes it much easier to unscrew. The one thing that this jar does have going for it is its extra wide opening, which makes adding food in and washing up afterwards that much easier. It has a 400ml capacity, which is perfect for one person - although if you’re particularly hungry you’ll need some extra sides.

Best Food Flasks To Keep Food Hot (2023) - Cook Bake Eat 12 Best Food Flasks To Keep Food Hot (2023) - Cook Bake Eat

The lid can be a major functional part of any kind of flask. Just like drinks flask which utilise the lid as a miniature cup/mug, so do food flasks have convertible lids. It might be a pertinent consideration, especially if you’re getting a food flask for camping or hiking trips, to have a flask with a lid that doubles up as a bowl. Some also come with foldable spoons, meaning cutlery becomes one less thing that you have to bring. Materials Material: 8/8 Pro-Grade Stainless Steel, Capacity: 591 ml, Hours cold: Unspecified, Hours hot: Unspecified. What is the best soup flask?To remove this, simply add a couple of tablespoons of white vinegar to the flask and top it up with water. Leave this for a couple of hours or overnight to give it time to work. The vacuum flask also has a screw-top lid with a seal that helps to stop heat from escaping from the opening. You can also get larger ones of over 800ml, which might suit one very hungry person or a lighter lunch for two. Obviously heat loss is still possible from the point where the two layers join up, and the seals, which is why even the best vacuum flasks will lose heat eventually. How much are food flasks? Some flasks are also designed with the intention of maintaining a low temperature for cold food. While not fully refrigerating them, flasks designed for this purpose will usually keep things cold longer than they keep things hot. But, some flasks are not meant for this, so bear that in mind.

SHO Food Flask - Vacuum Insulated, Double Walled Stainless SHO Food Flask - Vacuum Insulated, Double Walled Stainless

Of the food flasks we tested, we think the Thermos Stainless King food flask would be best for soups. The ones that will keep your food warm for longer will generally cost more, but they can also be more versatile. You get a foldable spoon with this food flask, which is stored on top of the inner lid. The inner lid also features a secret compartment just below the spoon, which can be used for storing salt and pepper if needed. Next, think about how long you would need to keep your food warm for. Look for ones that will retain heat for at least six hours. Finally, think about how easy it is to clean. Some flasks are dishwasher safe but it’s almost always better to wash it by hand. For this reason, a flask with a wider opening is generally better.

Best food flasks at a glance

Plus, the tapered top of the flask means it’s much easier to drink out of - but of course, you can use the foldable spoon as well. How does a vacuum flask work? Our Lifetime Guarantee is ultimately our promise that if you have a problem with a product we will find a solution for you. Food flasks vary in price depending on how big they are and how long they will keep your food warm.

SHO Food Flask - Vacuum Insulated, Double Walled Stainless

There are a couple of different ways a vacuum flask can keep the contents warm and it starts with the double-layered base. For any stains or bad odours, simply add a couple of teaspoons of bicarbonate of soda to the flask and then top up with hot water. The only downside we could find was that the opening was a bit more tapered compared to some of the other options, which meant cleaning up wasn’t as straightforward. For the kids’ lunchbox – The Food Flask from IGZOM is a great choice for kids thanks to a wide range of colourful and cheerful designs. It has plenty of volume (540ml) and heat retention capabilities (up to 6 hours hot) to keep food warm all the way to lunchtime and is compact enough to fit into a schoolbag without taking up too much room. Food Flask Buying Guide

How much are food flasks?

Our fantastic customers are the most important part of our business and we guarantee we'll be there for you during your journey with us. Some flasks are dishwasher safe, which makes cleaning really easy but it’s always best to wash it by hand if possible. France, Germany, Italy, Spain, Ireland, Netherlands, Austria, Denmark, Poland, Sweden, Czech Republic

SHO Food Flask - Vacuum Insulated, Double Walled Stainless SHO Food Flask - Vacuum Insulated, Double Walled Stainless

For kids, there are smaller capacity ones of around 300ml. These don’t weigh as much, will fit into lunch boxes and, as kids generally eat less, there’s nothing going to waste. You get an outer lid that can double as a cup while the inner lid is sealed for waterproofing and insulation. The inner lid also holds a foldable spoon so you have everything you need to take it on the go. We're extremely confident in our products quality & our aftercare service. Our Lifetime Guarantee which applies to every SHO product is a true representation of this faith. There’s no inner lid or cutlery with this one, nor does it promise to keep your food warm or cold for a specific amount of time. Because of this, we decided to go with a minimum keep-warm period of 6 hours. We don’t think it’s a huge problem but obviously it depends on how long you’d need to keep your food warm. For a camping trip where you might not eat for hours, it’s not ideal but for the office, the keep-warm time should be sufficient.Whatever it is you need from a flask, our buying guide is here to help you make a bit more sense of what you need in terms of the most essential criteria – after reading this, you should be absolutely sure which food flask is right for you. Capacity Thermos is the most well-known brand for making insulated flasks so they’ve got it down to a fine art. At 530ml, the SHO insulated food flask was one of the bigger ones we tried but you can get an even bigger 800ml version.