Our kits include the 4 most popular sizes found around the world. Occasionally a company will create a unique thread. The most popular non standard size in the world is found on Nivea, Eucerin and Aquaphor for which we have made a special adapter to fit. This specialty adapter can be purchased separately on our website here along with some smaller adapters for travel and hotel amenity size bottles.Note: Larger Nivea/Eucerin bottles require our specialty adapter. Specifically, the 4oz Eucerin bottle requires our Blue XXS Adapter.