cannabineer
Ursus marijanus
lol ... we made our own by nicking the newer pennies and dissolving the zinc out of them. (Pro tip: exclude air.) It was cool to have floating pennies like so many lily pads ... cnwater bath balls work well too (former lab rat, what can i say)
http://www.sigmaaldrich.com/catalog/product/sigma/z375934?lang=en®ion=US