
https://www.amazon.com/Squish-Mixing-Bo ... xing+bowls
However, recently, someone on the forum (I can't remember who and can't find the thread again) directed us to a video that recommended a product called "Thin Bins" for use in the cooler. I ordered a set from Amazon and they arrived tonight. I am pleased. When the lids are on tight, they appear to be air-tight and they did not collapse, even when I pressed fairly hard. When the lid was off, it was difficult to make them collapse, even when they were empty.

https://www.amazon.com/Thin-Bins-Collap ... containers
Footnote on the above Thin Bins: You don't slap the lids on. You use the attached clips and clip the lids on. If you slap the lids on, they can collapse down to the food level.
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Not a bowl or bin, the collapsible dishpan also works well and doesn't collapse until you want it to:
https://www.amazon.com/Prepworks-Progre ... HR2H2C6782
When workable solutions are found that help us when we camp, we should share them in camping secrets, to help others. I hope this helps you!
