I came across these a while back and was just wondering whether people actually use them for long term use, the only thing I can imagine these being used for are betta breeders when they need to separate the males. This is what the look like for people who are not familiar.
http://www.google.co.uk/imgres?imgu...age=1&ndsp=19&ved=1t:429,r:0,s:0&tx=111&ty=70
http://www.google.co.uk/imgres?imgu...age=1&ndsp=19&ved=1t:429,r:0,s:0&tx=111&ty=70