SailfinGirl
Fishaholic
I find that completely disgusting and offensive. When I had my betta he was in a 5 gallon tank and he was happy. imo, no fish can be happy living in a space that small, and imho we have every right to get angry at that seller, he/she must realise that what they are doing is wrong!

From just seeing the picture, it looks to me like about 2 cups, but sometimes pictures are misleading. 