Syringe Disposal Bottle Cap (or Fly Trap) v1

I actually designed this as a funneled bottle cap that fits standard soda bottles so I can use them to store used medical syringes before disposal, but it would probably make a decent fly trap as well. Come to think of it, it would probably be useful for any situation where you need to get small or thin items into a regular bottle.

I used JBijnens "Screw-on Bottle Cap" as a base because it printed easily in tests and fit tightly on the test bottles.

DISCLAIMER: When dealing with potentially dangerous items like medical waste and sharp needles, always use common sense, be careful and obviously follow any and all local laws and regulations!