Grrrr.. man that gets me going. I shop walmart for my pet supplies, and one store keeps their males in full-size tanks with friendly fish, the other in cups... their justification for cups is that the stock is sold within a week.
I simply do not care, they have 1-3 gallon bowls just sitting around collecting dust, why don't they sell them in kit?
Also, betta's are a real popular starter fish, so why don't the stores include little leaflet instructions on size/care/feeding etc???
I tell you, its awfully hard to see bettas in cups or about 20 females in a 5 gallon tank and not want to buy some of them to save them.
Actually, the Walmart fish guy gave me a dirty look when a customer asked about putting a betta in one of those 'vase' things and I chimed in and said, "Thats not what you want, here..." (grabbing a 2 gal acrylic hex), "... this tank will do a lot better" You know what she said, "Thanks... I'll take two!"
Now whenever I see someone admiring the bettas, I always suggest they try them in a (filtered) 2gal tank.