Preferably, use a perforating wheel to cut,
but in lack of such, you can cut along lines with a scalpel,
taking care to not cut all the way to the edge.
Keep it cool! Or warm if you were to do mulled wine and pour it back into the bottle. I guess Jasper made a wine insulator rather than a cooler, and who says it should be wine? This cool cooler is made from used corks from popped bottles - you can see their shapes on the cooler sometimes. When you can't, you had enough of chilled wine and it's time to drink water.