How to use flat stacks containers?

set of 4 silicone food containers

The flat stacks containers are made of high-quality food-grade silicone material.

It’s soft, so they can be stacked flat and therefore reduce about 60% of the space when popped up,

That’s the most desirable feature when you take these containers out for camping, picnic or other outdoor activities, and they can be packed into your backpack without occupying so much space.

How to use the flat stacks containers when you first buy them? Here are a user guide and maintenance for you to review.


Take the lid off and put containers into dishwasher or hand wash for the first flush.

Our silicone flat stacks containers are freezer safe, dishwasher safe and microwave safe, DO ensure the vent remains in the OPEN position when using them in a microwave, or you can leave the clips undone when placing them in a microwave.


Pop up the flat stacks silicone food containers before putting foods inside, cove the lid and get the clips locked. These containers can be used to store either liquid or solid ones. It’s waterproof as there is a silicone seal on the lid.

Someone may use the containers to store food in the freezer, no worries, our silicone flat stacks containers can be put directly into the microwave,

when doing so, make sure use defrost setting to thaw the food out entirely, then use heat setting on the microwave as required to heat the food.


After use, flush it with water directly or adding some friendly detergent to clean the containers, and you can also put them into the dishwasher, it’s quite simple to wash them.

LZ Industrial Limited produces many specifications of silicone flat stacks containers, OEM and ODM orders are also welcome, contact us freely if some of our products you are interested.




4 thoughts on “How to use flat stacks containers?

  1. admin says:

    Hi Marilyn,

    Thanks for your comment.
    Our flat stacks containers are made of silicone material which can be used in this temperature range, -40 to 250 centigrade,
    Although it’s still OK to use in the oven, but frequent use may speed up the aging of these containers in such high temp.
    We sugguest using them in the microwave.


  2. Mathieu Brousseau says:

    Hello Gary,
    I left a FlatSnack for 15 min in a oven at 350F and it started melting in the top inch.

  3. admin says:

    Hi Mathieu,

    Did you also put the lid into the oven? the lid may not withstand 350F such high temperature as it’s made of plastic material-PP,
    Products made of PP material will start deforming under the temperature of 230F.
    The silicone base of flat stacks containers will not have a problem under the temperature of 350F, as it’s temperature range is -40F to 446F.
    If you will cook with oven, better not to put the lid into it, hope I had answered your question.

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