Dispense a single pill into your hand with the push of a button rather than unscrewing the lid each time. The three components are each individually printed and assembled using two small screws. The push button operates with a spring harvested from any standard writing pen. The pill bottle is pressure fitted onto the pill hopper. Screw threads were omitted to provide versatility between different bottles. However, I fully support anyone modifying the design to include a threaded orifice. This design works best with smaller oblong or oval shaped pills with a hard outer coating such as those used for allergy medications. I've found that round pills with a matted surface such as standard Ibuprofen don't slide around each other easily and tend to clog the bottom mechanism. If a pill doesn't dispense after two pushes, a simple tap on the side of the bottle allows compacted pills to loosen and drop to the bottom.