We have a water cooler at work, with those five gallon bottles that seek to get people wet when the empty is replaced with a full one. To decrease the amount of water we have found that an X cut in the top releases less water when the bottle is changed.

I call the replacement "making water" . I have a knife that facilitates the process, but uncomfortable with asking me for the knife when I am working with a student, a co-worker came in and asked for "the water maker".