Adapter 1 - Medela, Pigeon Slim Neck, Dr. Browns Narrow Neck, NUK Classic, BIBS Adapter 2 - Tommee Tippee Adapter 3 - MAM, Pigeon Wide Neck Adapter 4 - Haakaa Gen 3, Como Tomo, Boon Nursh, Ola Baby Adapter 5 - NUK Nature Sense Adapter 7 - Dr. Browns Wide Neck Adapter 9 - NUK First Choice, Crane Wide Neck Adapter 10 - NUK Perfect Match NO ADAPTER IS REQUIRED FOR - AVENT, Harmony, Tiny Bloom, Chicco Perfect 5 & Original Touch, Minbie, Combi, Dodie, Lasinoh, Richell, Spectra. Please note: All adapters have an additional insert sealing ring, which keeps the connection between baby bottle and adapter tight. The device is only 100% tight if both sealing rings (heating plate and adapter) are used. If you are leaking fluid, you have most likely forgotten a seal ring Adapter Use: For a more secure fit, screw adapter into the warmer tightly first, and then screw in your bottle.