Crochet Project: Wineglass Flip-Flops

I'm making two sets of these wineglass flip-flops, one to donate to the barn to go in their wine basket sets for the Buckaroo Ball, and the other set as a wedding gift (this will be my project while I'm on class at GDF next month). You set the wineglass on top of the coaster, then slip the straps over the edge of the glass to hold it in place. The ones I've completed so far still need to be washed and blocked to dry in their proper shape. They're made from this pattern by The Crochet Dude, using small amounts of cotton yarn and a G hook.

Variegated green/white wineglass flip-flop