Tattler Reusable E-Z SEAL Canning Lids & Rings - WIDE MOUTHTATTLER Reusable Canning Lids Key Features: BPA Free Made in the USA Indefinitely Reusable For Hot Water Bath and Pressure Canning No food spoilage due to acid corrosion FDA approved materials Dishwasher Safe Tattler Lids do require a bit of variation from conventional metal lids. Being a two piece combination with a rubber gasket ring, Tattler Lids must remain a bit loose during processing in order for the jar to vent the pressure that has built in