Isaac | Bevi

If bevi means "drink" (vt), does that mean that as a noun it means "(the act of) drinking"?

Also, in the discussion of articles in the grammar, there's this:

Me bevi de cafe.  I drink some coffee.

I don't see how "de" belongs there at all... The only way I can read this, assuming the above is correct, is "My drinking of coffee".

Isaac