Turn any regular-mouth mason jar into an air-tight storage container with Masontops Tough Tops. Unlike other plastic storage lids that bend and buckle, Tough Tops are built to last. The underside of each lid has a custom gasket channel which holds the BPA-free gasket in place at all times. Tough Tops are perfect to store all foods and liquids, as well as crafts, hardware, sewing supplies, and much more. When it's time to clean, just pop them in the dishwasher. They won't warp or crack and will protect the contents of your jars for years to come. | Masontops Regular Mouth Tough Top Plastic Lid | Size Regular-Mouth