The answer to the Ops question is yes. You will get one small drink around meal time.
If you want or need more, I find wandering around to the cabin (with cup) and asking if you could have another is generally met with a good response. Ideally you would do this while the seatbelt sign is off.
Unless you are physically disabled and unable to easily move around, I would avoid the use of the call button unless really required.
ACs earphones are somewhat poor. Pack your own. Same applies to the snack before landing, or grab one in Rome. Your doctor will thank you.