A 5.0 Replacement Lid is specifically designed for Vittles Vault Food Storage Containers in the following sizes: 10 lbs, 20 lbs, 30 lbs, 50 lbs, 60 lbs, and 80 lbs. The 5.0 replacement lid comes with an adapter that installs on the container and a lid. Simply install the adapter ring onto the container first and then spin the lid for an airtight seal. Continue giving your pet fresh food and a Vittles Vault Replacement Lid.