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Mainstays Food Jar Insulated Food Storage Container, Stainless Steel, Round, 28oz, Ideal Use for Workday Meals and Travel to Keep Meals Hot or Cold

Key item features

  • Thermal Performance: Features double-walled construction and pressure valves to create a vacuum, preserving food temperature for hours, with pre-heating/chilling recommendations for maximum efficiency.
  • Versatile Use: Ideal for workday meals and travel, accommodating hot or cold foods like soups, salads, entrees, dips, and snacks.
  • Secure Design: A locking lid creates an airtight seal to prevent leaks and retain freshness, ensuring perfectly portable meals.
  • Durable Material: Constructed from food-safe stainless steel, which is durable and resistant to retaining food odors or flavors.
  • Practical Dimensions: Measures 7" x 7" x 3.5" and has a 28oz capacity, with a wide mouth suitable for various food types.
  • Care Instructions: Requires hand washing only to maintain its integrity and performance.
  • Enhanced Portability: Keeping the container in an insulated lunch bag can improve its thermal performance during transport.
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Current price is $29.88
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Customer ratings & reviews

4.3 out of 5 stars
stars535 ratings387 reviews
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Reviews summary

Pros

  • : Holds a single serving or adult portion of food comfortably.
  • : Keeps hot or cold food at desired temperature.
  • : Keeps food at a consistent temperature for an extended period.
  • : Allows for easy access and efficient cleaning.
  • : Container fits well in lunch boxes.

Neutral

  • : Offers premium features at a higher cost, but quality varies across users.
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Showing 1-3 of 387 reviews

Jan 8, 2026
Coco
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Can keep lunch warm

I have been looking for a bigger insulated lunch box for my high school son for a while. This one is a good fit. Wide opening and can hold enough for a teenager boy. I tested it by pouring hot water in the container. After 4-5 hours, the water was still very hot.

Helpful?1TEKJQ2UUZTS622568263
May 19, 2025
Yerim
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Highly recommend!

I recently purchased two insulated food containers from Mainstays — the 33 oz rectangular and the 28 oz round ones — and I'm really happy with them! Both containers are made of stainless steel and feel very sturdy and well-made. They keep my food warm for hours, which is perfect for busy days when I don't have time to reheat my meals. The lids seal tightly, so I don't have to worry about spills. I also love the sleek and simple design. Definitely worth the price. Highly recommend!

Helpful?1TEKJQ2UUZTS622568263
May 24, 2025
anonymous
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

worth it!

It is bigger than I thought! I put water in and shook it, and the water didn't flow out. I thought it was a bit expensive, but I changed my mind as soon as I opened it. It's a good price range, based on the silicone on the lid and the durability of the bottle itself.

Helpful?1TEKJQ2UUZTS622568263