The bat phone was red and for some reason it was kept on a cake stand with a glass dome.
Which makes sense. Batman was obviously in fantastic shape and probably never ate cake. So what to do with the cake stand he got as a house warming gift? Well, put the bat phone in it, obviously. It kind of classed up the whole "answer a call from Commissioner Gordon" thing.
I'm sure Commissioner Gordon appreciated the gesture, what with him having to deal with the likes of The Bookworm, Egghead, The Minstrel, Louie the Lilac, and The Clock King on a daily basis.
Man, that Clock King. He was a stone cold killa.
Bat phone . . . matters.