Flat Stacks - Collapsible Silicone Food Storage Containers Flat Stacks are collapsible, 100% airtight storage containers, designed to give you double the space in your kitchen. They’re BPA free, microwave safe, and colour coded, so safe, versatile, and easy to organise for you and your family. Product #: FLS Regular price: £26.99

Flat Stacks

Collapsible Silicone Food Storage Containers

  • Buy 2 for £17.50 each and save 8%
  • Buy 3 for £15.00 each and save 22%
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  • Free delivery
  • Free returns

Free delivery over £35 & free 100 day returns

Choose Your Items

Large Rectangle Set

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Small & Medium Rectangle Set

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Blue & Pink Lunchboxes

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Small & Medium Round Set

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  • Features

    • Exceptional space-savers - Flat stacks stack flat. 
    • Sturdy and unbreakable
    • Ergonomic flip-top covers and curved edges.
    • Awesome in the microwave
    • They look cool. No more eyesores in the cupboard
    • Excellent value for money.
    • Built to resist stains and smells for life-long freshness
    • Made of silicone, not plastic, for strength and durability
    • BPA free Flat Stacks are completely safe for you and your family
  • Sizes

    Large Rectangle Set:

    Container Expanded Size Collapsed Size Volume Weight
    Large Pink 23 x 16.3 x 7.4cm 23 x 16.3 x 3.0cm 1200ml 296g
    Large Green 25.8 x 18.3 x 7.4cm 25.8 x 18.3 x 3.4cm 1500ml 350g


    Small & Medium Rectangle Set:

    Container Expanded Size Collapsed Size Volume Weight
    Mini Yellow 11.8 x 8.3 x 6.4cm 11.8 x 8.3 x 2.6cm 350ml 107g
    Small Purple 15.1 x 9.3 x 6.4cm 15.1 x 9.3 x 2.7cm 540ml 142g
    Medium Orange 17.2 x 10.7 x 6.4cm 17.2 x 10.7 x 3.0cm 800ml 183g
    Large Blue 20.2 x 12.2 x 6.4cm 20.2 x 12.2 x 3.4cm 1200ml 249.5g


    Small & Medium Round Set:

    Container Expanded Size Collapsed Size Volume Weight
    Mini Yellow 12 x 6.4cm 12 x 2.7cm 350ml 114g
    Small Purple 14 x 6.4cm 14 x 2.8cm 540ml 141g
    Medium Green 16 x 6.4cm 16 x 3.0cm 800ml 188g
    Large Red 18 x 7.4cm 18 x 3.4cm 1200ml 228g


    Blue & Pink Lunchboxes:

    Container Expanded Size Collapsed Size Volume Weight
    Lunch Blue 21.5 x 13.5 x 7.4cm 21.5 x 13.5 x 3.0cm 1000ml 294g
    Lunch Pink 21.5 x 13.5 x 7.4cm 21.5 x 13.5 x 3.0cm 1000ml 294g
  • Reviews

  • Videos

    Double your kitchen space with Flat Stacks

    Flat Stacks customer Adele on why she loves Flat Stacks

    Flat Stacks Founder Julie on why she started Flat Stacks

  • What's in the box

    Large Rectangle Set:

    • Large Pink
    • Large Green 


    Small and Medium Rectangle Set:

    • Mini Yellow
    • Small Purple
    • Medium Orange
    • Large Blue 


    Small and Medium Round Set: 

    • Mini Yellow
    • Small Purple
    • Medium Green
    • Large Maroon


    Blue & Pink Lunchboxes:

    • Lunchbox Blue
    • Lunchbox Pink


  • Description

    Flat stacks stack flat.

    We don’t mean that in a Dr.Seuss kinda way. They actually do. You'll save more than double the space in your kitchen and keep your cupboards tidier than ever. When full of food, they can go as high as 3 and 1/2 inches, and when collapsed can then magically scrunch down to a teeny tiny inch.

    Have you ever dropped a tupperware-like hybrid container that are a dime a dozen? They crack and crease, and sometimes just shatter. You certainly get what you pay for sometimes. With Flat Stacks, the small investment is well worth it as their well-engineered design is both ergonomic and tactile. The flip and clip top covers seal in food making them 100% leak-proof.

    Some plastic containers are actually embarrassing. They can look shoddy. When flat stacks are brought to a barbi or pot-luck get-together they can make the food look even better. They even look awesome in the cupboard, no matter what your favourite colour is. It’s like an instant facelift for your kitchen cabinets.

    They will not smell like curry six months after you keep cooking your trademark favourites. We know this because every single person in Wowzr HQ is either an avid cooker or an epic eater. We know our food. These storage containers will outlast most of your other off the shelf plastic containers.

    We all have a nightmare shelf or a ‘third drawer down’ with stuff we don’t like but can’t bear to throw away. Or where unidentifiable tupperware lids end up. Recent unverified research indicates that 96.8% of people who own generic plastic containers can’t find the lids. Same research suggests YOU can save up to 80% of your time in the kitchen with the ease of preparing food, and storing leftovers, cleaning them afterwards (and looking for lids).

    Flat stacks are 100% airtight, 100% leak proof

    Most containers claim to be airtight, but that puddle on the floor tells a different story. Unlike the other guys, Flat Stacks actually are airtight and leak proof, so liquid doesn’t get out, and oxygen doesn’t get in. No spillage and your food stays fresher for longer, thus saving you money on every shop!

    With Flat Stacks, it’s simple to organise your nightmare-ish shelves and cupboards.  

    They are space-saving, stress-free and super efficient. You can store your food expanded or collapsed, you can store food in either an expanded or collapsed position, saving you all kinds of space. You can even serve dinner in a Flat Stack, if so inclined. Just set it on the table and help yourself. Leftovers? Simply drop it down with the food inside, pop the lid on, and it goes straight in the fridge or freezer.

  • FAQs

    Is there a difference between the lunch boxes and other containers?

    Yes. The lunch boxes have a number of compartments that keep food separate, and they come with cutlery. The regular containers don’t.

    What does BPA free mean?

    BPA is an industrial chemical, often used in plastic consumer goods like water bottles and containers. Some studies have linked it to various illnesses. BPA Free means BPA hasn’t been used in the production of the container, and so is totally safe for your family to use.

    Do I need to use special settings to put Flat Stacks in my dishwasher?

    Nope. Just run it with your regular load, and watch it come out as clean and fresh as it was when you bought it.

    Is it difficult to collapse the container? Will it stiffen up over time?

    It’s easy as pie to collapse or expand Flat Stacks. You simply push and pull. They’re made of silicone, so they are built to last.

    Can I handpick the colours, shapes, and sizes I want, or do they come in specific bundles?

    With Flat Stacks, you get four awesome options:
    1. Four rectangular containers, ranging from small to medium.
    2. Two large rectangular containers, perfect for family dinners.
    3. Four round containers, ranging from small to medium.
    4. Two lunch boxes (one pink, one blue) with separate compartments.


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