Regular Mouth Leakproof Lids feature a 1-piece, screw-on design that is leak-proof, airtight, freezer-safe and dishwasher-safe. Store your favorite recipes in iconic jars and secure with Leakproof Lids. The airtight seal is perfect for herbs, spices, on-the-go salads, smoothies, and more and is freezer-safe for storing jam recipes, sauces, and soups. One-Piece Leak-Proof Regular Mouth Storage Lids, 6-Pack Fits Regular Mouth Mason jars (not included) Ridged edge provides a secure grip Airtight and leakproof Not safe for canning Plastic construction Includes 6 lids Made in Malaysia