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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. When we tested this flask, it kept the contents piping hot until we were ready to enjoy it and the slimline frame meant it was easy to store in our lunch bags or take on the go.

How to clean a flask

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. For best results, please ensure that your food or liquid is heated sufficiently prior to insertion into your SHO Food Flask. If it’s just you then you might not need something as large as the SHO food flask which is where the ValueTalks flask really excels. It has a 450ml capacity which is ideal for one serving and is compact enough to pop in your bag, going relatively unnoticed. 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.

In general, contents should not be left in the Food Flask for any longer than 24 hours. If contents are left in the flask for longer than 24 hours, or you suspect spoilage, use caution when opening the flask. Spoilage of food inside the flask can cause pressure to build, possibly leading to the forceful ejection of the stopper or contents. In such circumstances, before attempting to open the flask, ensure the opening is pointed away from yourself and any other person. This food flask is made from stainless steel which has a range of benefits. For starters, it’s really lightweight so it won’t weigh you down, but it’s also incredibly durable. On top of this, stainless steel is very resistant to rust so you won’t need to worry about the life of your flask. 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. You want something lightweight but you don’t want something that compromises durability for this. Therefore, it’s really essential to look at the materials and choose something with a good balance between the two. Flask Size You don’t need to spend a fortune on a soup flask and while this one isn’t a whole lot cheaper than the others on this list, there is a difference in price. But this doesn’t mean that you have to compromise on quality and performance; the Flintronic food flask does a great job at keeping your food warm.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. France, Germany, Italy, Spain, Ireland, Netherlands, Austria, Denmark, Poland, Sweden, Czech Republic Of course, there is a limit to this and eventually the soup will get cooler but some of the best soup flasks can keep the soup warm for up to 24 hours! Now that’s impressive. And you might think that this means just keeping the soup lukewarm but we’re talking still hot, so much so that you have to blow it before you can eat it. For best results, please pre-heat/pre-cool your SHO Food Flask with boiling water/ice cold water for 5-10 minutes.Fill and then close the lid.Empty after 10 minutes.

One of the most interesting things about the soup flask is that it’s actually a great way to keep your food fresher for longer. Since the flask is sealed with a vacuum, it’s incredibly difficult for germs and bacteria to get inside. No oxygen can get in which can speed up the process of spoiling and everything stays fresh and ready to eat. The leak-proof design also promises to keep your food hot for up to six hours or cold for up to eight. The vacuum flask also has a screw-top lid with a seal that helps to stop heat from escaping from the opening. 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. We also had to wrap the spoon to make sure it stayed clean before use as it’s on the outside of the flask rather than the inside.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. If the lid of your Food Flask is difficult to open by hand, do not open the flask and dispose of it at your local waste facility. 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. On a budget – The 720°DGREE wunderJar Food Flask makes for surprisingly good value for those not wanting to overspend on a food flask. Even with its environmentally-friendly credentials, which often come with a little extra on the price tag, this particular flask is very reasonably-priced for a flask with a solid amount of volume for single portions and exceptional build quality and style.