Flat Stacks Square Set > 12, 18, 27, 40 oz


Our square set of Flat Stacks consists of 4 durable containers of different sizes from small to large. It's perfect for children's meals, cold cuts, pantry storage, packed lunches, and much more. Save space and money with these innovative food storage containers.

Key Features:
  • BPA & BPS Free - 100% safe for your family
  • Save up to 60% of valuable storage space
  • Press to seal or pullout top valve to vent air out
  • Keeps food fresher for longer

Detailed Dimensions + Specifications:

Square Set weights measurements etc.

Flat Stacks space-saving, collapsible storage containers help you save on valuable kitchen space! These versatile and colorful containers collapse flat for easy stacking when not in use. Store leftovers in the fridge, freezer, or pantry, and when the leftovers disappear, simply collapse the container down after cleaning for convenient storage in a cupboard or drawer.

Messy Cuprboard on the left, organized cupboard with Flat Stacks on the right

These handy containers SAVE up to 60% of space, are microwave, dishwasher, and fridge/freezer safe as they are BPA & BPS Free (100% safe for your family). These durable containers also come with matching valves on the lids so you are not left searching for a match in your cupboards.

Say goodbye to disorganized, messy cupboards and have a stress-free kitchen with Flat Stacks.

* As seen in the video, lunch boxes are discontinued. Now available: round sets!

    Customer Reviews

    Based on 204 reviews
    Nice sizes

    Like the different sizes that fit where the rectangular ones don’t.

    Christina Lucas
    Squarely fits well

    Love they fit so well into the freezer or fridge then flatten when not in use. Great colours & size options in this set with the smallest being more useful than l'd thought it'd be .

    Donna Greene
    Totally love these containers

    I am extremely happy with these containers. They are such a great idea. In the past I have bought containers that I cannot get the lids onto without stepping on them. Then after a while the lids are so loose they won’t stay on. These containers don’t have that problem. Also I love the material they are made out of, they don’t absorb the sauce, they don’t loose their smooth surface. They are way more functional than the competition. And they store away in small spaces. Couldn’t ask for better.


    A bit smaller than I thought they would be, but you can’t beat the quality

    Love them after 3yrs, bought more

    We love Flat Stacks so much we had to come back and buy more. We live in an RV and these are great because they take such little space to store, the lids stay snapped on the containers so you never have to find the lid and they last. We just got rid of our old plastic containers and this is our second time buying this set.

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