Microwave, dishwasher, and freezer safe, BPA free;One-touch click-lock design is air & water tight. Keeps food fresher longer!;Modular design is easily stacked in pantry and fridge, containers are great for snacks and dry goods;Heat resistant push mechanism functions as handles after microwaving;Set Includes: 2 (1 Cup), 2 (1.7 Cup), 1 (2.75 Cup), 1 (6 Cup)