Zekke suddenly got a mental image of the DADA class practicing the Frostbite charm on water, thereby potentially making popscicles, and the idea of the class making popscicles...

His lips quirked like mad as he fought away the mental image and he raised a hand. By the time she called on him, his lips had stopped quirking, but his eyes shone just a touch brighter than normal.

Deciding to settle his imagination once and for all, he asked, "We can use this spell in dueling and whatnot... but could it have more... errrr... useful 'everyday' properties? Is the spell strong enough to make ice cubes or popscicles, for example? Or does it work strictly with living and breathing beings?" He paused a moment, considering what some of the students were saying.

"And actually... water expands when frozen. If you put water in a closed container and freeze it, the container will expand because the water expanded."