So here i shall post, and encourage others to post, all the tanks that they say are "just great" for bettas, when actually is a form of cruelity!
Hagen Dragon Marina Betta Kit at PETCO
Half gallon tank and the substrate is only supposed to go in the very center, i don't like these at all! actual quote from a comment on this tank as well:
"..And besides, they wouldn't sell it as a betta kit if it wasn't safe for a betta..."
Fish Bubble Wall Mount Fish Tank at Wrapables - Aquariums & Bowls
Granted it is a gallon and comes with many warnings, but for some reason i just don't think this would be a good idea at all, just think if something knocked into it and it fell over!