This Vittles Vault® 2.0 Replacement Lid is specifically designed for Vittles Vault Food Storage Containers in the following sizes: 8 lbs, 15 lbs, 25 lbs, 35 lbs, and 40lbs. The 2.0 replacement lid comes with an adapter ring that secures to the container and the lid. Simply install the adapter ring first, then spin the lid for an airtight seal.