Blood drink

I want to add a drink that replenishes blood points u.u how can I do this? I've looked at the do_drink and liquid types code but i can't seem to get deep enough to actually understand it.
I know liquid types, there's three numbers.. I tried adding new digits and having that new digit = to the amount of blood points it recovers, but I can't get it right >.<

I also want to take this time to thank everyone who's donating their time generously to everyome =)

Well, the *easy* way to do this would be to add a blood liquid type if one doesnt already exist and add a check in do_drink for that specific liquid and have it replensih a set number of bloodpoints.