These containers are leak proof, stain-resistant and oven-safe with the lid off. The containers are protected from chips and breaks by a silicone sleeve. This meal prep set allows you to store food for a feast efficiently and easily. Silicone sleeve protects glass and tabletops and provides a no-slip grip. Glass doesn’t leach, stain or smell. Leak-proof lid with sealing snaps for on-the-go. All parts dishwasher safe. No need to remove sleeve for cleaning. Microwave safe without lid. Oven safe up to 450 degrees F without lid. Freezer safe. BPA Free