Just got a response;
Thank you for being concerned about the Bettas. I am a former Betta Breeder/Collector and these bowls are much bigger than those sold at a pet store. Rather than someone buying a $5.99 - $7.99 bowl that holds 4 - 8 oz of water, these bowls are only $2.50 ea. and can hold 26 oz of water, great for betta fry or sm. Bettas. The bettas in Thailand are not only found in small ponds, but in small puddles too. I see your point and I do agree with you that they should be living in a big aquarium, but if someone going to purchase a bowl it's better that they purchase a 26 ounce bowl rather than 4 ounce for a higher price. I hope you see my view on things and I appreciate your concern.
If you always do what you've always done, then you'll always get what you've always got.