why 4x height for the can? 3x would fit better imo
The extra height is for the opened top, it'll still be attached.
also what do you mean by bricks in lego sets? That is a very vague suggestion. Do you mean like detailed bricks such as windows and such?
Lego mug, 1x2x2 glass window, 1x4x3 glass window, and maybe a centered cylinder block.