bettas don't come from China and they don't "live" in puddles. When it is dry and the water is very low they survive in the puddles, but they certainly don't thrive. It is not ok to make a betta live in a small cup. Why do you think they don't have the muscle to live with a filter and they are very suseptable to fungal infections, because they literally waste away in the cups. My girls live in 2.5 gallons and my boy lives in a 5. When you put them in a big tank you can watch the muscle grow. A small tank can't cycle anyway so they suffer in chlorine, ammonia, nitrites, and nitrates.