Why does cap of every bottle or tube opens anticlockwise and closes clockwise. Was it decided initially.

Question

Why does The caps of bottles like soda bottle or cold drinks opens up rotating anti clockwise and closes clockwise. Same is with any tube like toothpaste or any ointment.

In: Engineering

Answer 1

It goes back to why are all screws and lids tighten clockwise?

Your bicep muscle. The arm motion to tighten a screw or a lid is called supination. The arm motion counter clockwise is pronation. the muscles that do that are smaller and not as powerful. Your arm will tire less from screwing in 10 screws than unscrewing those same screws, in general.

So in general, anything where you want to exert more force to tighten, its clockwise.

Of course this applies to a right handed person. Everything is opposite for a left handed person.