Meal prep is easier than ever with this two-in-one bowl set featuring the same Therma-S'well® technology you love that keeps hot foods hot and cold foods cold. The triple-layer, vacuum-insulated exterior bowl and durable Tritan™ inner prep bowl can be used together or separately and are a stylish, sustainable solution for everyday eating. Includes a triple-layer, vacuum-insulated exterior bowl, durable Tritan™ inner prep bowl and lids Outer bowl is 41/2" x 4 3/4"; prep bowl is 3 1/2" x 4"; keeps food cold for 11 hours and hot for 7 hours Holds 21.5 oz The outer bowl is condensation proof, leak-free, and dishwasher safe Each BPA/BPS-free prep bowl is fridge and freezer friendly and is safe for the microwave and dishwasher. Prep bowls are marked with convenient measurements Outer bowl is 18/8 food-grade stainless steel; prep bowl is Tritan® plastic Top-rack dishwasher safe Imported S'well is committed to the highest verified standards of social and environmental performance as a Certified B Corporation, supporting programs that seek to protect our environment, empower communities and encourage advocacy through action