I'm just kind of getting started pouring and painting a few heads for myself and wanted to order me some fluid beds I've heard so much about. I have done some searching on here and couldn't really find what I was looking for what is the difference (other than size) between the 2'' and 3'' is one better than the other also do I need to order a cup for the different colors I plan on using I'm just looking at painting maybe 3 to 5 different colors and can you store the paint in the cups thanks for any help.