Many jars have stainless steel lids but not all can boast a rubber seal that's truly airtight. The satisfying "pop" on opening tells you it has been hermetically sealed - something you'll find in the best kitchen canisters. Air and odors stay out completely! Borosilicate glass is versatile and easy to clean. Did you know that glass isn't just glass? Borosilicate glass (aka space shuttle glass) is designed to withstand temperature changes without breaking. Put these glass canisters (not lids) in the dishwasher, microwave, freezer or fridge, worry free! Your set contains varied sizes for tidy pantry organization and storage, and each features a 4" wide opening for reaching inside easily with a scoop! Details: Clear 4" wide mouth opening Set of 6 Airtight with BPA free inner seal Microwave, freezer, and fridge safe Dishwasher safe (not the lids) Gift boxed with secure padding 1-year limited manufacturer’s warranty Borosilicate glass jars with stainless steel lids Size Information: 10 oz. (3.3") 16 oz. (4.5") 23 oz. (5.25") 30 oz. (6.37") 40 oz. (7.62") 54 oz. (9.87")