SHULOPAL glass jars with airtight lids, the best for kitchen storage for freshness, use them as cereal containers, salt containers, coffee jars, oatmeal containers, glass pasta canisters or for herb storage. Made ofbBorosilicate glass,which is designed to withstand temperature changes without breaking. Put these glass canisters (not lids) in the dishwasher, microwave, freezer or fridge, worry free!