I’ve Searched for a curved balancing bottle holder pattern online without success. So here’s one I use. It’s from a wood working magazine and printed on 8 1/2×11 paper. Hole size is usually 1 3/8” for 750 ml bottles. Width can vary from suggested 1 7/8” to whatever you like. I’ve gone with 3” here.
-- If you believe you can or can not do a thing, you are correct.