Hard cup sparkleballs require a bit more effort. They take 3 days to make, so glue can set. The cups crack easily, and if you drop a hard cup sparkleball, it’s a disaster. But hard cups are sparklier and come in fun colors. Instructions will work for 5 oz cups and Party Essentials 9 oz. For 9 oz Chinet brand cups the formula is slightly different. (see below)
UPDATE: You can also build a Hard Cup Sparkleball with bobby pins :) See post here.
5oz 14-11-6-1 / 64 9oz Party Essentials 14-11-6-1 / 64 9oz Chinet 14-11-6-1 + middle row of 14 / 78
Click on photos for more information.