Mainstays

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

Mainstays Food Jar Insulated Food Storage Container, Stainless Steel, Round, 28oz, Ideal Use for Workday Meals and Travel to Keep Meals Hot or ColdMainstays 28 oz Round Insulated Food Storage Container Stainless Steel2 pack Mainstays 28 oz Round Insulated Food Storage Container Stainless Steel4 pack Mainstays 28 oz Round Insulated Food Storage Container Stainless Steel
Multipack Quantity:1

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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About this item

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Customer ratings & reviews

4.3 out of 5 stars
stars536 ratings387 reviews
How item rating is calculated
5.0
5.0
4.6
4.5
4.4
2.5
  1. 5 stars75% (402)
  2. 4 stars7% (37)
  3. 3 stars4% (19)
  4. 2 stars2% (13)
  5. 1 star12% (65)

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
HEIDI
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Keeps Food Hot and Mess Free! Perfect for School!

Fantastic product for school lunches! I packed a chicken noodle soup for my son's lunch and it stayed hot and tasty just like it came off the stove. He loved it and I felt good knowing he had a warm meal. The stainless steel construction is very high-quality and the insulation really works. It doesn't leak or spill, which gives me peace of mind. I'll definitely be getting more for the whole family.

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