A raccoon chewed through the plastic bottle of our hummingbird feeder.....so we found this worked as a replacement!
Looks like it is working well. I have some 8 oz bottles wonder if they would work. My friend buys that kind as she likes drinking from bottles. I sometimes paint the words Coca Cola in red as I saw a very old bottle like that. 1 I have handy, I painted cat-tails all around bottom. I use glass enamel paint so it stays on. Bottle has to be very clean & wipe down with alcohol & don't touch area you are painting. I then paint it & let it dry 30 days & it will stay nice. My bottles are little fat in middle & then get thinner & go out again towards bottom. Fun painting them. Only I gave them all away except 1. Anyway I like your idea!! Jan