My husband brews his own beer and the refill kits do not come with carbonation drops. This bag of 60 drops is a great addition to his supplies because it is enough to create 6 gallons of beer. If you have the 2 gallon system like my fiance does, that means that it can be stretched over several batches. Directions state that you add two to each beer (place in the bottom of the bottle before adding your fermented beer on top.
Carbonation drops are really an essential part of brewing your own beer. I would recommend this to anyone who creates their own, especially if you are just starting out and getting a lot of refills.