I put mine in the grease dumpster out back where every month i collect a small ammount of money for them to come collect it.
....as for pouring grease down the drain...
I, being the owner of a small business, suggest that you DO NOT, that is, DO NOT pour grease down the drain. Even with hot water, that doesnt make a difference. If you continue you may find yourself in some big plumbing problems later. If anything, you should freeze the greese, and dump it in the garbage on collection day.