I've been using this MEAL PREP SQUARE BOX SET X2 for weekly meal prep and it holds up well. The stainless steel feels sturdy yet light, and the vacuum-sealed lid lock truly keeps soups and stews from leaking in my bag. Microwaving with the lid on is a nice touch since the vent reduces splattering and heat time. Both the 37 fl oz and 47 fl oz sizes stack neatly in my cupboard, and the removable seals make cleaning easy. The semi-transparent lid helps me spot leftovers fast. Only note: not for combi-ovens, so check your microwave type.