TRANSFORM your mason jar into your new favorite to-go cup, providing a convenient and attractive way to bring your drink with you. FITS REGULAR-MOUTH canning jars, recommended jar size: 16 oz. Fits regular mouth Ball, Kerr, Kilner, and Anchor Hocking 16 ounce mason jars (Jar not included). STURDY CONSTRUCTION: These lids are made from long-lasting and food-safe silicone, ensuring they will serve you well for many years to come. EASY TO CLEAN: Though these drinking lids are easy to handwash, they are also dishwasher safe, saving you time so you can spend more time enjoying. PLEASE NOTE, this item does not include any mason jar components (jar, lid ring)