Are they actually any good?
I tend to like tin foil because it holds the shape of a wrap better or zip lock bags if im making sandwiches the day before. Would beeswax food wraps be a serviceable alternative.
(I tried silcone food bags but found them large for the amount of they actually contained and didnt clean up well, so they went for the chop. I quite like paper bags but they dont seal if i make ahead and if use them to portion stuff in the freezer they stick together. So i wasnt impressed with those either. Id like to improve my eco credentials but im not doing very well so far)