I've considered keeping beta fish in my clear-glass double-sided Polynesian Resort mugs, but the Aloha Tiki Aquarium looks like a much better solution.
The cylindrical aquarium is packaged inside a resin(?) tiki head that stands 24 inches tall and 13.5 inches around. The stock model comes equipped to sustain salt-water fish, but a fresh-water version is also available upon request.
Note: The manufacturer has several other fantastic designs, including a couple that would look at home in Captain Nemo's Nautilus.