Geo Sports Bottles 3-Gallon Glass Carboy Clear — 30mm Cork or 55mm Crown Cap, Scratch-Resistant Fermenter

Geo Sports Bottles 3-gallon clear glass carboy is a reusable, impermeable fermenter designed for small-batch beer, wine, cider and mead production.

This 3-gallon round glass carboy (BT3GG) is crafted in Italy to provide homebrewers and hobby vintners a durable, inert container for primary or secondary fermentation. At 9 inches in diameter and 16 inches tall, it fits standard brew setups and accepts 30mm cork finishes or a 55mm push/crown cap, making it adaptable to common closures. Because it’s made from high-quality glass, the bottle resists scratches, will not absorb odors, and helps limit oxygen ingress compared with many plastics—while remaining fully recyclable and BPA/BPS/BPF/PVC-free.

How does this glass carboy protect my brew during fermentation?

The carboy’s premium glass is impermeable to oxygen and won’t leach chemicals into your beverage. That creates a stable environment for yeast activity and maturation without lingering off-flavors from absorbed residues.

• Non-porous glass prevents oxygen transmission better than many plastics
• Scratch-resistant surface allows rigorous cleaning without damage
• Does not retain foul odors or flavors between batches
• Lead- and BPA/BPS/BPF/PVC-free for safer storage

What closures and accessories work with this 3-gallon carboy?

The carboy accepts a 55-mm crown cap or 30mm cork finish depending on the closure you prefer; a 6.5 mm rubber stopper is recommended for using an airlock. Note that caps, corks and stoppers are sold separately so you can choose carbonating caps, reusable grommets, or standard fermentation stoppers.

• Compatible with 55-mm crown caps for easy sealing and bottling
• 30mm cork finish option for traditional cork closures
• Recommends 6.5 mm rubber stopper for airlock fit (not included)
• Works with common homebrew fittings and siphons for transfers

How easy is it to clean, store, and reuse this carboy?

The scratch-resistant glass allows you to scrub the interior with brushes or sanitation solutions without worrying about surface damage. Because glass does not absorb smells, it reduces the need for intensive deodorizing between batches and is fully recyclable when retired.

• Durable glass tolerates cleaning brushes and sanitizers
• Resists staining and odor retention, simplifying turnaround
• Reusable for many batches, lowering long-term waste
• Arrives securely packaged to prevent transit damage

Will this carboy fit in my brewing setup and how big is it?

The bottle measures approximately 9 inches in diameter and 16 inches tall, a compact profile for tight fermenting spaces or small-temperature-control chambers. Its 3-gallon capacity is ideal for test batches, recipe trials, or small household production runs.

• 3-gallon volume suited to experimentation and small batches
• 9" diameter and 16" height for compact storage and racks
• Made in Italy with attention to glass thickness and balance
• Compatible with standard homebrew accessories for easy integration

Who is this for: This Geo Sports Bottles 3-gallon carboy is aimed at homebrewers, hobby vintners, cider makers and mead artisans who want a reliable, inert fermenter for small-batch work. It’s a good choice for brewers transitioning away from plastic, for those running pilot recipes, and for anyone who needs a compact, easy-to-clean glass carboy that accepts common closures. Note: crown caps, rubber stoppers and airlocks are not included, so plan accessory purchases accordingly.