I really love these tumblers and I guess I'm not alone. My older nieces (ages 16-19 years) asked if I would make them some for Christmas. I of course went to the store and bought a whole bunch of them. I only need to make about 6, but I think I bought 20 just in case.
In the past I've only gotten the clear ones, but I'm excited to see how these colored ones turn out. The hard part will be deciding which color for which niece. I'll post an update later on how they turned out.