Originally Posted by
rumrunn6
Wifey has been using
these new units. not sure where she got hers. they seem very good. I've only washed them, never used them. if I were carrying them in a bike trunk I would sit them down right side up & maybe inside a plastic shopping bag. I usually do that anyway for the stuff that doesn't always stay in the trunk

we have some of those from costco (or very similar, maybe from the container store is a more premium original and costco is a knockoff?)
I would not call ours waterproof. I keep a rectangular one and its lid at work for microwaving instant ramen. When I take it out of the microwave and clip the lid on, the lid does a good job of getting everything back to my desk, but if I just hold it sideways, it quickly starts dripping (I've tried)