Dish Soap Bottle Holder

I have been annoyed that my roomates throw away the soap container when it is low rather than empty, and I promised my wife that if I got a 3D printer I would make things that are practical for the household. So here is my dish soap holder, which sits conveniently by the sink. It will work best for seventh generation brand, but any bottles of the same size should work as well. The width of the arms is intended to only allow the bottle to be fitted in one way.