2 pieces of durable, food‑grade equipment designed to turn PET bottles into reliable, leak‑proof CO2 vessels for beer, soda, and home brewing. Why you need this Quickly and safely carbonate or pressurize PET bottles without specialized kegs or fittings. Durable stainless steel construction resists corrosion and holds up to repeated use. Leak‑proof silicone seals keep CO2 where it belongs so you get consistent carbonation and fewer wasted fills. Key benefits Reliable seal: Food‑grade silicone gaskets provide a tight, reusable seal to minimize leaks and maintain pressure. Long‑lasting material: Solid stainless steel body resists rust, dents, and wear from repeated connections. Ready for common setups: 5/16 in barb ball lock fitting accepts standard tubing for CO2 lines, making integration with homebrewing equipment straightforward. Cost effective: Includes two caps so you can pressurize multiple bottles, run experiments, or keep a spare on hand. What's included 2 x stainless steel carbonation caps Built‑in 5/16 in barb ball lock fitting Silicone seals installed for leak‑proof performance Product attributes Material: Stainless steel body with food‑grade silicone seals Size/connection: 5/16 in barb ball lock for tubing attachment Quantity: 2 pieces Compatibility: Designed for use with PET bottles (for beer, soda, and general home brewing applications) Function: Acts as a CO2 adapter/carbonation cap to pressurize and carbonate beverages Performance and care Reusable and easy to clean — rinse with warm water and mild detergent, inspect silicone seals regularly. Stainless steel construction minimizes flavor transfer and stands up to repeated use. Silicone seals are replaceable and food‑grade for safe contact with beverages. Use cases Homebrewing small batches: Force‑carbonate tasting bottles to evaluate recipe tweaks without filling a full keg. Homemade soda and cocktails: Carbonate flavored syrups or mixers in PET bottles for parties or on‑demand drinks. Portable carbonation/dispensing: Connect to a CO2 line to pressurize PET bottles for short‑term dispensing or transport. Simple to integrate Attach tubing to the 5/16 in barb, secure the cap with its silicone seal on a PET bottle, and connect to your CO2 source. The cap provides a compact, affordable way to add CO2 functionality to bottles you already own. Practical and reliable Sold as a pair for convenience and redundancy. Ideal for hobbyists, small batch brewers, and anyone who wants a durable, food‑safe way to carbonate and pressurize PET bottles.