Awe your betta's are lovely and colourful I can see that alot of time, thought and effort has gone into providing a home for your betta's... CONGRATULATIONS on being a new betta mummy/daddy
My fish are fine in these bowls and there healthy and strong. I dont need heaters for my Bettas because of the weather at the moment but I wouldnt need heaters any way because of central heating in the house.
There just ordinary plastic Bowls which I got for £5.00 Bargain lol.
I like shen his my favourite, I love them all the same but he was my very first Betta so hes special