This cake was for a retirement. She worked at a plant that makes the plastic bottles for coke (hence the plastic and not a can). I think it turned out alright. I live in a small town, so I wasn't able to find the rock candy. Cake is (3) 6" and (2) 8" on top. All buttercream, used tip 21 up and down the dowel and on the top of the "glass" to look like bubbles. Thanks to all who have posted this cake before, 'cause they were inspiring!!! TFL