How do you say used to drink in spanish?

It depends on how you mean the phrase "drink please".

If it is a polite request for someone else to take a drink, i.e. I give you a bottle of water and say "drink this please", it would be "Bebe, por favor".

If it is a request that someone pass you a drink, it would be "Bebida, por favor" or (if the drink is alcoholic) "Copa, por favor".