Sometimes your airgap lets out a bittt more than air. That bit more ends up all over your counter if you're really unlucky (like me). This airgap cover diverts the overflow directly into the sink. Pictured is the previous revision which I can upload on request. The newest version uploaded here has a taper at the end for aesthetics.
Bottom diameter of this cap is 39mm and is a snug fit. I recommend installing it with teflon tape or similar to prevent leakage if you have excessive volume coming through.
Printed straight up with supports in PLA (you may not need them if your overhangs are great).
The author marked this model as their own original creation.