SHO Food Flask - Ultimate Vacuum Insulated, Double Walled Stainless Steel Food Flask & Food Container - 8 to 12 Hours Hot & 18 to 24 Hours Cold - 800ml - BPA Free (800ml, Original Stainless Steel)

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Some flasks are dishwasher safe, which makes cleaning really easy but it’s always best to wash it by hand if possible. 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 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.

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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. The Hydro Flask insulated food jar was one of the simplest designs we tried and the 28oz (828ml) version offered some serious capacity. You can also get a smaller 20oz (591ml) version, though. It has a 400ml capacity, which is perfect for one person - although if you’re particularly hungry you’ll need some extra sides. 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.There are a couple of different ways a vacuum flask can keep the contents warm and it starts with the double-layered base. For drinks flasks, you’ll need an elongated brush that can reach the bottom, whereas for food flasks, which are shorter and have wider openings, it’s generally possible to wash it as you would a mug.

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Of the food flasks we tested, we think the Thermos Stainless King food flask would be best for soups. 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? The wunderJar (literally Wonder Jar or Miracle Jar in English) by German brand 720°DGREE is sold with a mindset of reducing plastic waste and actively supporting charities promoting fresh drinking water. The flask is constructed out of the company’s proprietary ‘KeppDGREE’ technology which uses durable double-walled food-safe stainless-steel to keep food hot for up to 9 hours and cold for up to 16 hours.In testing, we found that the jar lived up to its promise of keeping our food hot for six hours and cold for up to 7. Of course, one of the main reasons to buy a flask is to keep hot food hot. As such, heat retention is another of the most important factors to consider before buying. This heat retention time can vary hugely between around 4 hours, up to 12 hours and potentially even longer than that. This means that you have to factor in how, where and when you intend to use your flask. For single portions, a few hours is probably fine, but on longer expeditions with multiple meals, you’re naturally going to need one that’ll hold onto that heat for longer.

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

Promising to keep food hot for up to 6 hours and cold for up to 10 hours, Keetan’s food flask is a large-volume choice with a decent heat retention time. Counting on vacuum insulation between two layers of kitchen-grade stainless-steel, as well as a copper coating on the internal layer, it not only has good temperature retention but is also easy to clean. Available in 3 colours it’s a simple but stylish affair; blue is pictured, but red and stainless-steel silver are also for sale. Another feature we loved was that this jar had a wider opening, which made it much easier to clean afterwards. 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. CapacityThe ones that will keep your food warm for longer will generally cost more, but they can also be more versatile. What we particularly liked about this one was the range of colours it’s available in, meaning it’s easy to get a shade you like. 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.