Because I bought 10, they were $0.86 each. The larger sizes are more. They look like a stack of watch batteries stuck together.
I stopped by Gold aquariums today and met with Albert. He is doing up a quote for me but here is a quick sketch that I did in mspaint. Please use your imagination, it should turn out better than this... oh man, I hope it turns out better than this

.
Also excuse my stocking list. All I could afford was three, uh, m&m's?
- Chad