We are new owners of an Ultimaker 2 and are having a great time experimenting. We'd like to try glow in the dark filament, but Ultimaker unfortunately doesn't offer it. I've heard horror stories about using different filaments, and I'd rather not use something that is going to muck up our printer. Does anybody have any recommendations for 3mm PLA glow in the dark? We're in the US and would prefer to buy it here if it's available.