This is a replacement lid for Ion8 leak-proof water bottles. It features the same one-touch, one-handed operation, smooth flow, and leak-proof design with a safety lock as the original lid. The replacement lid is a complete unit, including new fitted closure seals. It is designed for ION8 large leak-proof bottles and fits RECYCLON and STEEL models ranging from 750ml to 1200ml. This lid allows you to extend the life of your bottle with a simple swap.