LIP I also made myself a small bubbler-sized bong like that out of a straight-sided bud vase.
I like being able to see how much smoke it is holding, and I prefer smaller hits anyway.
For Pete's sake people keep your glass clean! lol! If a previously-clear piece is dirty enough to become nearly opaque, do you REALLY want to be smoking out of it? Mmmm yay for pond-scum bongwater... Blech!