Custom-designed silicone sleeves protect your lsf glass jars from chipping or breaking. Made of 100% fda food-grade silicone that is bpa/bps-free, phthalate-free and contaminant-free. Silicone materials are degradable and can complete a full cycling pathway – they are sustainable, completely degradable, and have a minimal impact on the environment. It's estimated that by 2050 there will be more plastic in the ocean than fish. By choosing glass containers you are actively helping to reduce single-use plastic bottle pollution and keeping our oceans clean. Hand-washing your sleeve with warm water and mild soap is recommended.