The other day I was in a nearby hobby shop to buy some empty bottles for my BADGER 250 airbrush, which has a 43MM tread mount for the suction cup cap. The empty Badger branded bottles were about $1.50 each.... iWhile walking over to the sales counter to buy 6 empty bottles, I noticed the store was also having a sale on the small Tamiya acrylic paints for the same price... I thought "before I spend $1.50 for an empty bottle - let me just see if the Tamiya small paint bottles will fit the Badger cap"..... SURE ENOUGH - the small bottles of paint thread PERFECTLY to the Badger 250 (and possibly other model) units. So now, I get "free" paint along with my bottles... never hurts to check, eh? Learn something new every day! -