Hefty Clip Fresh 6.7 CUPS RND BOWL (W/FRSH KPR) Lasting Freshness:Locking clip system with silicone ring creates an airtight leak-proof seal. Easy-to-use:Comfortable grips are easy to open and close. Microwave, freezer, and dishwasher safe. Safe and Durable:High-quality, BPA-free materials. See-thru lid and sides. Versatile:Wide variety of sizes and shapes, ideal for storing food at home or on-the-go.