A gasketed clip seal survives being carried lid-down in a bag, which is the point in a staff kitchen. Check the reheat rating on the lid separately from the base, since plenty of containers are microwave safe while their lids are not, and that is how a lid warps. Square footprints stack better. See food containers, Sistema and breakroom and kitchen.

Sistema pantry containers, lunch boxes and drink bottles arranged in a bright kitchen storage and meal prep setting.