Tokis-Phoenix
^_^
The major main problem i can see with this thing being used as a betta tank, is it doesn't have a hood/lid- bettas are well known for being jumpers, i could see a betta eaily jumping out of such a tank/bowl.
I don't have lids for my bettas.
. just lots of water changes. i think a room with lots of these would be sweet. petco sells them here bout that much too.