Tommee Tippee Sangenic Universal Cassette 3PcEnvironmentally Friendly The Twist & Click System Ensures That Each Nappy Is Individually Wrapped In The Optimum Amount Of Anti Bacterial Film, Meaning Less Waste. Refill Lasts Up To 1 Month Each Refill Provides Enough Anti Bacterial Film To Wrap Up To 1 MonthS Worth* Of Nappies Depending On The Size And Number You Use. * Based On Size 1 Nappies Twist & Click Bins: Twist & Click Refills Are Only Suitable For Use With Twist & Click And Sangenic Tec