I purchased them as a set of three from the Joanns store when they had a lot of stuff on clearance so I'm not sure if they do still sell them there. I would prefer to buy them and stickles individually. I also got a three pack of Stickles in
Js. They only had a few colors so I bought most of mine from Ebay.
As for other uses for them I'm sure that there are many but so far that's all I've used them for but they do add a lot of punch even just doing the dots. They come in a bottle just like Stickles with similar tip.