Bummer! I was watching the demo wondering about how food temps would affect their performance. Maybe that plays some part in their unsealing when they put them in the fridge.
Too bad too, cuz I just hate saran wrap.
I use those things that look like shower caps but go over bowls. Not a great seal, and you can't do anything with em but cover stuff for the fridge, but that part it works ell for.
The hunt for perfect storage continues, lol.