How? (The wrapper not the bottle)
Using photoshop, a printer and some clear tape.
How? (The wrapper not the bottle)
Hence the idea of the tiny slot in a metal can top. It is highly unlikely that a blade could find its way back out when turned over. In fact I spent a good deal of time shaking the demo model I made and not one blade fell out.
I would not toss it in the regular trash either. Mine goes in the recycle bin which does not get touched by workers hands.