Our #10 Silicone Stopper is the professional choice for securing Better Bottle plastic carboys and vessels with a 1 5/8" to 2" opening. Whether you need a Ventilating Bung to act as a self-gassing airlock, a Bored Bung (with hole) for standard airlock attachment, or a Solid Grab Ring Bung for airtight storage, our premium food-grade silicone ensures a contamination-free environment for your vintage or sample.
Precision Fit for PET: Specifically tapered to fit the unique neck of Better Bottle and other PET plastic carboys without slipping or popping out under pressure.
Self-Gassing Ventilator: The Ventilating option allows CO2 to escape while blocking oxygen, eliminating the need for a traditional water-filled airlock during long-term aging.
Laboratory Grade Durability: Crafted from 100% non-porous silicone that is BPA-free and heat-resistant; it won't absorb odors or leach flavors, even after repeated sanitization cycles.
American-Made Quality: Proudly manufactured in the USA, providing a level of safety and quality assurance that professionals in the wine and medical fields trust.
