The bottle is opened.=has been opened or is open now?
I mean does"The bottle is opened" mean the bottle'cap is not on or the cap is on but has been twisted off the plastic band beneath?I am sure I once heard it from native speaker.
Thank you.

Question

Answer

All three mean the same thing. The bottle, which was at one time not opened, is now open. Sometime between then and now, someone or some thing opened it. If I am working in a bar, and I see three bottles of wine on a counter, I might ask my colleague, "which of these bottles is opened?", though I'd probably say "which one is open?"