One of my costumes for this Halloween season!
I always wanted a yip yip costume but wanted to do something special for it. We used furry material and I sewed foam around the mouths so that they had a permanent but flexible shape instead of just a black circle in a blanket. I'm so happy with them ( though there's a lot I'd change/will change in future versions ) and they were so well received! Thank you internet for inspiration!
I'm the pink one. :)