Intelligent Lids are one-piece, reusable plastic mason jars lids. The Drink Lid is a one-piece lid designed for use with or without a straw; for hot or cold liquids. Fits wide mouth mason jars with 3 3/8″ outer edge diameter. (Also available for regular mouth mason jars) Slide area is spill resistant, NOT watertight Help you reduce, reuse and recycle using mason jars you already have. Made from food-safe polypropylene #5 that is recycled and recyclable. Do not contain BPA, BPS or Phthalates Dishwasher safe Minimally packaged in recycled and recyclable kraft board Don’t rust like metal canning lids NOT for use in canning