That is the plan. I've had the cap laying around for a dozen years or so. When the upside down carboy systems came out (can't recall the Mfr name) the idea was better than reality. I was lucky to get half the trub out, forget about harvesting yeast and the CO2 bubbler tube often got debris in it if you weren't careful and became partially, or worse, clogged. I hope this design works a little better.