Why am I always searching for matching lids for my tupperware, or whatever brand of reusable container I am using? Why are there so many different sizes and shapes?
I would like to see a range of these with the lids connected to the actual container, so you can keep and wash them together. You would not have to hunt for lids, and you use and clean them both at the same time usually anyway.
Common lid sizes would perhaps not work, but do they all, even within the same brand, need to be just that little bit different/incompatible ?