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Mainstays Food Jar Insulated Food Storage Container, Stainless Steel, 27oz, Perfect for School Lunches and Activities to Keep Meals Hot or Cold

Key item features

  • Thermal Performance: Double-walled insulation maintains food and beverage temperatures, keeping contents hot or cold for extended periods.
  • Leakproof Design: A removable, no-leak lid creates a vacuum seal, ensuring freshness and preventing spills.
  • Durable Construction: Crafted from robust 18/10 food-grade stainless steel with an attractive brushed-metal exterior.
  • Convenient Features: A wide-mouthed opening accommodates various foods and drinks, while the no-sweat design prevents condensation.
  • Easy Cleaning: The container is dishwasher safe, specifically designed for top-rack cleaning.
  • Enhanced Efficiency: Pre-heating or pre-chilling the jar prior to use maximizes its thermal capabilities.
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Current price is $19.84
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Customer ratings & reviews

4.5 out of 5 stars
stars332 ratings177 reviews
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Reviews summary

Pros

  • : Maintains temperature for extended periods.
  • : Provides great cost effectiveness.
  • : Stays hot for several hours.
  • : Keeps liquids at a consistent temperature.

Neutral

  • : Can be tight and leak-proof, but may also separate or trap liquid.
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Showing 1-3 of 177 reviews

Apr 6, 2026
Paola
Item details
Size: 16 oz
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Works like a charm, sou will keep HOT!

Keeps soup HOT HOT HOT! <3 Packed my lunch at 8am, had it at noon, still burned my tongue with my soup! Best value for your buck. Best purchase i've done for mainstay items by far.

Helpful?9d4030d0-4508-11f0-8d8f-136482466119675638687
Feb 21, 2026
Teresa
Item details
Size: 27 oz
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Great little thermos!!

Great little thermos for carrying hot or cold food to work! Don't lose the seal when washing or it's useless. And, it comes off easily. Great price for a really good thermos!!

Helpful?9d4030d0-4508-11f0-8d8f-136482466119675638687
Feb 18, 2020
BallPug
5 out of 5 stars review

Perfect for hot or cold items!

The Mainstays 27 Ounce Stainless Steel Insulated Food Jar has been coming to work with me all week! When I first got this food jar I actually filled it with my breakfast shake that needs to stay cold and this food jar kept it at an incredibly cold temperature for a long time. I really like that the mouth opening on this food jar is super wide so I don’t have to crush down my ice or anything else that I’m putting in here. I have also put soup in this food jar and I think that’s actually my most favorite thing to put in here. I really love that there is a little pressure relief valve button that actually reduces and releases the steam from the jar. I was a little worried that my food or drinks would taste like steel but they haven’t at all. This is made of durable 18/10 food grade stainless steel. This container is double walled and insulated which pretty much keeps everything the temperature that it should be. I really like that the top comes off and could be made into a little cup or bowl. I have put this jar in my work bag and it has fallen over sideways turned upside down and hasn’t leaked once!

Incentivized Review
Helpful?9d4030d0-4508-11f0-8d8f-136482466119675638687