10 Best Food Flask 2025 in the United States

The Thermos Stainless King Vacuum-Insulated Food Jar is a solid choice if you need a reliable container to keep your meals hot or cold for hours. With a capacity of 47 ounces (about 2.9 pounds), it’s roomy enough for a full meal or multiple snacks. Its stainless steel construction is durable and designed to resist dents and wear, which means it should last through daily use. The flask features vacuum insulation, so it keeps food temperature well, whether hot or cold. It comes with two storage container inserts, which is handy for separating different foods.

The lid clips on securely and is leak-resistant, adding to its convenience for carrying around. There’s also a built-in carry handle, making it easier to take on the go. Cleaning is straightforward since it’s dishwasher safe, but the care instructions recommend hand washing to keep it in the best shape. One minor drawback is that the item weighs about 2 pounds, which might feel a bit heavy if you plan to carry it all day.

It’s also microwave safe, which is rare for metal flasks, thanks to the included inserts—just be sure to remove the metal parts. This flask suits people looking for a durable, versatile, and easy-to-carry food container that can handle a variety of meals, from hot soups to cold salads.

The THERMOS Stainless King Food Jar is a solid choice if you want to keep your meals hot or cold for long periods. It holds 24 ounces (about 1.5 pounds), which is a good size for a lunch serving without being too bulky. Thanks to its vacuum insulation, hot foods like soup stay warm for up to 14 hours, while cold foods remain chilled for up to 24 hours, making it ideal for a workday or outdoor trips.

The jar is made from durable 18/8 stainless steel, which resists dents and rust, ensuring it lasts through daily use and adventures. Its exterior is designed to stay cool when holding hot contents and sweat-proof with cold ones, so you won’t get messy hands. The lid is a handy clip-on type that seals well to prevent leaks and also doubles as a serving bowl, adding convenience when you’re eating on the go. Cleaning is fairly easy since it’s dishwasher safe (top rack recommended), though hand washing might be gentler over time. It’s reasonably lightweight and compact, making it easy to carry in a bag or backpack. However, it’s not microwaveable, so reheating food inside the jar is not an option.

This food jar is suitable for anyone needing a reliable, durable container for hot or cold meals, particularly those who want a well-insulated option with a practical lid design.

The THERMOS Stainless King Vacuum-Insulated Food Jar with Spoon has a 16-ounce capacity, making it suitable for a single meal like soup or a beverage. Thanks to its vacuum insulation technology, it excels at keeping meals hot for up to 9 hours or cold for up to 14 hours, which is ideal for people who need their food to stay at the right temperature during long commutes or workdays. Made from high-quality 18/8 stainless steel, the jar is durable and built to withstand rough handling, whether for daily use or outdoor activities like camping.

Its sweat-proof design ensures it remains comfortable to handle, regardless of the contents' temperature. The included foldable spoon and insulated lid that doubles as a bowl add to its convenience, making it easy to eat on the go without needing additional utensils. Cleaning is straightforward with its dishwasher-safe feature, though top rack cleaning is recommended. The screw cap lid ensures a secure seal, preventing leaks and spills. However, the food jar is not microwave or oven safe, limiting reheating options, and its 16-ounce size may be small for those with larger meal needs.

Given its combination of features, durability, and temperature retention capabilities, this food jar is particularly well-suited for professionals, students, or outdoor enthusiasts who need a reliable way to keep their meals hot or cold throughout the day.