Batman may not like his enemies, but he can learn from them. In Arkham City, after defeating Mr. Freeze, he agreed to help save his wife, Nora, who had been taken by Joker's men. To do this though, he needed to get to a building surrounded by water. Not an easy task.
Luckily, the two came up with the Cryogenic Grenade, an ice bomb of sorts that would allow Batman to freeze water for a time and allow him to walk on it. This also came in hand when other things needed to be frozen as well.
It's not a permanent solution, but it's enough to get the job done.