About this 3D model

Adapts a dropper top sold for 1 oz "regular" bottles to fit on bottles with a smaller mouth. See article for details: http://swampcastle.blogspot.com/2011/12/dropper-caps-for-extract-bottles.html Also available at Shapeways, sadly not cheaply: http://www.shapeways.com/shops/swampcastle?section=Cooking