Dough Proofing BoxesEach set contains two stackable boxes capable of comfortably accommodating 12 dough balls (6 in each box) and a lid to prevent your dough from drying out, regardless of where you're proofing it: on the counter, in the fridge, or in the freezer. Our boxes are constructed from food grade plastic, making them suitable for use in the fridge, freezer, and dishwasher, ensuring easy maintenance. The box fits on most standard domestic fridge shelves.