Carboy Stopper Clamp

thingiverse

This is a clamp to hold the rubber stoppers down on glass carboys for brewing. Keeps wet new rubber stoppers from pushing up out of the bottle. The clamp slides on with a positive holding grip and has access through the top for airlocks. It is cut away for attachment and removal without disturbing stopper or airlock. Current model is based on 6.5 gallon carboys from Northern Brewer, but OpenSCAD file is available for customization. This should also work for the 3 and 5 gallon versions.