We used the sample cones they give out in the grocery store. I only used white paint, and painted it on like it was whipped cream dripping down the ball. The glitter stuck well to the paint. You could also use a snow texture compound. You can get this in any craft store.
Glitter sticks to it well before it dries.
We learned that by experience too. Have a great day. I just bought about 40 mini-mug salt shakers at Garden Ridge for 35 cents. I have my girl scout troop in mind. We have a huge bag of leftover hot chocolate that we made for an event.