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Our square set contains the 4 most useful sizes, perfect for everything from packed lunches to leftovers and baby-food to cold-cuts. Save space and money with these innovative food storage containers.

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

Flat Stacks space-saving collapsible storage containers save on valuable kitchen space! These versatile and colourful 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.

These handy containers SAVE up to 60% of space, are microwave, dishwasher, and fridge/freezer safe as they are 100% BPA & BPS Free (100% safe for your family). They 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.


Product Dimensions:

Yellow - 350 ml | 11.3x11.3x6.4 cm | collapses to 2.8 cm

Purple - 540 ml | 13.2x13.2x6.4 cm | collapses to 2.8 cm

Orange - 800 ml | 15.2x15.2x6.9 cm | collapses to 3.0 cm

Blue - 1200 ml | 17.2x17.2x7.4 cm | collapses to 3.2 cm

Product Weight:

110-232 g/.24-.51 lbs


2 year limited against manufacturer's defects.

Care & FAQ's

  • The seal on my lid comes out in the dishwasher.
    The seal in the lid does come out for cleaning purposes. If food was trapped under the seal and it was not removable, there would be a potential for mold to build. We would suggest removing the seal prior to placing the lids into the dishwasher to ensure they are not lost or damaged. When replacing the seal, ensure the seal is inserted on its narrowest side.
  • My lids seem to be warping?
    Always use the top rack of the dishwasher, if you choose not to hand wash this product. This will prevent the lid from becoming too hot and changing shape. Even though Flat Stacks are dishwasher safe, like any item, hand washing provides product life longevity.

Customer Reviews

Based on 7 reviews
B Salfi
Square Flat Stacks

Excellent product. We now have 5 sets of Flat Stacks and absolutely love them. They take up so little room when not in use yet seal and stack nicely when in the fridge full of leftovers.
The customer service with this company is AMAZING. So easy to deal with. I had an issue with the seal on a few of our FlatStacks that were 5 years old and Ocean Sales went above and beyond in making us satisfied customers. Will definitely shop here again.

This was heartwarming to read, we appreciate you sharing your experience! We will share your review with our team, feedback like yours reinforces our commitment to customer satisfaction. Thank you :)

Elaine Novacek
So far so good

I bought these to get rid of all my other Tupperware type bowls and lids. Going great. Love them.

Welcome to the Flat Stacks family Elaine! We are confident you will love them, and if you have any questions, please feel comfortable to reach out to us. Enjoy compacting your cupboard!

Jenny Flanagan
Love these!

These are by far the best space saving food storage containers. I’ve tried cheaper versions but they are just too thin and flimsy. Do yourself a favor and spend the extra money on Flat Stacks.

We couldn't have said it better ourselves! Thank you Jenny for the raving review, we appreciate it so much, we hope you enjoy the Flat Stacks!

Judi Beddow

They work good and save room which is great

Fantastic Judi! So happy that you are enjoying them. Thank you for your review!

Tim Vanderveer


Customer Reviews

Based on 2 reviews Write a review