Well that guy has his own blog on the web, i know because i've been emailing him for the past month. On his blog he says he welcomes feedback, yeh right. I have been very polite to him, explaining that these vases are not suitable etc etc but to date have received no replies.
This was the first one i sent -
"Hello.
Whilst your designs are asthetically pleasing to the eye, i can assure you that a betta will NOT flourish in 0.2 of a gallon. Its a bit like a healthy human being, spending their whole life in their bathroom! Whilst wallowing in their own waste.
Firstly, Ammonia from fish food and waste will build up within hours, poisoning the fish. I know this for a fact. I have monitored the ammonia levels in a 1.5 gallon jar containing a juvenile betta and found that the ammonia started showing after approx 18 hours!
Secondly, and contrary to popular belief, bettas do not live in little puddles. They live in 1000's of gallons of water in Rice paddies, slow moving streams and canals.
For someone who has taken so much time and effort over their adverts and blog, you have actually not taken in to account the needs of the fish at all. You, I'm afraid, are simply adding to 1000's of premature fish deaths."
And then -
"Is it just good feedback you want to hear? I believed the idea of asking for feedback was to hear the views of all? I can only assume that you really have no interest in the health of the fish that find themselves confined in these jars. There are far too many people trying to make a fast buck regardless of whom or what they harm".