Originally Posted by unionrdr
Those are about 24 ounces.
The large Cooper's PET bottles are 740ml, exactly 25oz.
Yes, use only one in a 12oz bottle. Carb drops are nice and I've used them a number of times but I'm switching to bulk priming since it's much easier to adjust the priming sugar amounts for different sized bottles and for different desired CO volume levels. Plus, it's one less chance of contamination. I'm sure most don't sanitize their hands or wash with antibacterial soap prior to handling the drops. The risk is really small, but it's still there.