EcoJarz Stainless Steel One-Piece Storage Lids are BPA-free and rust-resistant storage lids for mason jars. We design them for storing your food, dry goods, vinegars, essential oils, knick-knacks, or whatever else you like to store in your jars, without the worry of rust or chemical leach. The FDA approved silicone gasket creates an airtight seal when you tighten the lid. Fits any regular-mouth canning jar Store dry food in pantry Store leftovers in the fridge Not for use with traditional canning Stainless steel and FDA approved silicone Dishwasher safe! No retail packaging New one-piece design means you don't have to look for a jar band to use, just grab and go! Due to the high failure rate of the silicone gasket, we do not recommend canning with the EcoJarz storage lid. Fits any regular-mouth mason jar, with an opening of approx. 2.5 inches.