I was also reading somewhere on here where some import BP could not be imported because it was in plastic containers and you can not ship BP into the US in plastic containers. Don't know the rules myself, just what I read!
Personaly I use a Lee Powder Disk with the hard red plastic container. When I feel its real dry, like it was a few days ago...and was shocking myself on everything I touched, I use the dipper!!!!! Doubt it will ignit it but thats my comfort zone.