Insulated Food Flasks for Meal Prep UK

Who Should Buy a Food Flask?

Buy one if you work somewhere without a microwave, hate queueing for the office microwave, drive between sites, study on campus or want hot food during colder months without buying lunch out.

Food flasks are less useful for meals that need separate textures, such as crispy chicken with salad. They shine with wet, warm food that stays pleasant in one pot.

Best Meals for a Food Flask

Soup, lentil stew, chilli, bolognese, porridge, curry, dal and softer rice dishes work well. Dry meals can compact and turn heavy, so add enough sauce or liquid to keep the texture pleasant.

For high-protein prep, a flask is useful for chicken soup, turkey chilli, lentil dal with yogurt on the side, or oats with protein stirred in after cooking.

How to Keep Food Hotter for Longer

Preheat the flask with boiling water for a few minutes, empty it, then add hot food. Fill it close to the top, close it promptly and avoid opening it until lunch.

Do not use a food flask to rescue lukewarm food. Heat the meal thoroughly before packing and follow the manufacturer instructions for the flask you buy.

Food Flask Verdict

A compact food flask is worth adding if no-microwave lunches are a regular problem. It will not replace containers, but it gives soup and stew meal prep a proper place in the week.

Preheating Is the Whole Trick

Fill the flask with boiling water, put the lid on, leave it five minutes, then tip it out and add the food. Almost every complaint about a food flask being lukewarm by lunchtime traces back to skipping this, because a cold steel flask takes a great deal of the heat out of the food in the first few minutes.

The food should go in hot rather than warm, and the flask should go in full. A half-empty flask has a volume of air to keep hot as well, and it will lose the argument by midday.

What Travels Well in One

Wet, dense food: stew, chilli, curry, soup, dhal, bolognese, porridge. These hold heat because there is mass and liquid, and they are no worse for having sat in their own steam for four hours - arguably better.

What does not travel is anything meant to be crisp, and anything that keeps absorbing. Pasta continues to soften and will be past it by lunch; roasted vegetables go limp; anything breaded is a waste of a good coating. Those belong in a container with an ice pack and a microwave at the other end, which is a different problem with a different answer.