Stainless Steel Carbonation Cap – Ball Lock Gas Fitting

These stainless steel carbonation caps are a durable upgrade to the classic plastic versions, giving you the same functionality with added strength and heat resistance. Designed to screw onto standard PET soda bottles, they feature a ball lock gas-in fitting, allowing you to connect directly to your CO₂ system for quick carbonation, purging, or pressure transfers.

If you’ve used plastic carbonation caps before, the process is exactly the same. Fill a bottle, attach the cap, connect your gas line, and carbonate or pressurize as needed. What sets these apart is the stainless steel construction, which makes them far more robust and suitable for higher-temperature cleaning and sanitizing. That makes them a great fit for heavier use or environments where durability and repeat cleaning matter.

These caps are commonly used for:

• Carbonating small batches of beer, cider, or water
• Quickly making sparkling water or soda
• Purging bottles with CO₂ before filling
• Transferring liquids under pressure
• Taking carbonated drinks on the go in PET bottles

Because they thread onto standard soda bottles, they’re a flexible and low-cost way to work with pressurized liquids without needing kegs or specialized vessels. The ball lock fitting integrates seamlessly with standard draft systems, making them especially handy if you already have CO₂ equipment.

Compared to plastic caps, these stainless versions offer longer lifespan, improved durability, and resistance to heat during cleaning, while maintaining the same simple, effective design.

If you’re looking for a reliable, reusable tool for carbonation and pressure work, this is a solid upgrade that fits right into your existing setup.