Find the right stoppers, bungs, and airlocks to protect your wine during fermentation and aging. At MoreWine!, we offer a wide selection of silicone and rubber bungs in various sizes, plus airlocks that create a perfect seal while allowing CO₂ to escape. Whether you're working with carboys, barrels, or tanks, our winemaking stoppers and airlocks ensure a clean, controlled fermentation. Trusted by home and professional winemakers alike.
Stoppers, Bungs & Airlocks
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Foam Stopper (Autoclavable)
Due to high demand, the case of 100 is currently out of stock. Be the first to receive your items by placing a pre-order today. We will automatically ship this to you when we receive more inventory. Reusable, non-absorbent, white foam stoppers provide a snug fit, yet allow free airflow. Ideal for Erlenmeyer flasks when propogating yeast cultures. Autoclavable up to 249°F (121°C) Fits 35-45mm inner diameter openings in graduated cylinders, tubes, and flasks Easily manipulated - springs back to original shape after use Resists alcohols, bases, esters, and dilute acids
$2.99
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Rubber Stopper - #13 Solid
#13 stopper - solid. Top diameter 2.64 inches (67 mm), bottom diameter 2.28 inches (58 mm), length 1 inch (25 mm). BPA-free stopper made of food grade materials. Injection molded TPE for superior consistency throughout. Perfect for use with carboys, as the material sticks well to glass and PET, even when wet. Max. Temperature Rating: 158 °F (70 °C).
$6.49
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CellarScience® Universal Breathable Bung | Complete Set
Not sure what bung is right for you? We got your back! Get all the Breathable Bungs with this complete set. Includes: Breathable Carboy Bung Breathable Universal Bung Breathable Barrel Bung Breathable Bung for Glass Carboys A breathable Silicone stopper that acts as both a stopper and an airlock. Unique design allows CO2 pressure to escape but keeps Oxygen and airborne contamination out. This quickly became our stopper of choice for wine, and is a popular style used by numerous commercial wineries. Also has great application for beer ferments: It will create a vacuum if fermenting wort cools (as opposed to pulling water in from your traditional airlock.) Airtight seal is great for extended fermented lager when CO2 production is still present but very slight. Fits 3, 5, 6 & 6.5 gallon glass carboys, 1 gallon bottles, growlers, and 500 mL flasks. Replaces Stopper Sizes #6, #6.5, #7, #8 Stopper Measurements: 0.94" x 1.48" (24 mm x 37.5 mm) Universal Breathable Bung This CellarScience Bung has a ridge to keep it from getting sucked in and self-sealing vent holes to let air out but not in. They have a gentle taper, so they don’t slip out during use. They are also very easy to clean and sanitize. This a perfect fit for a 1.5” TC ferrules, Fermonsters, and Vintage Shop Plastic carboys. Replaces Stopper Sizes #8, #9. #10 Stopper Measurements: 1.36" x 1.89" (34.5 mm x 48 mm) Breathable Barrel Bung We recently discovered this premium breathable silicone barrel bung and were immediately impressed with its robust design and features. To start with, the ridge really helps make bung removal effortless. The bung acts as an airlock and allows the release of CO2 while maintaining a seal against oxygen coming in. This makes the bung ideal for alcoholic or malolactic fermentation in barrels or tanks. Fits 30- and 60-gallon barrels as well as the hole in the lid of most Variable Volume tanks! Also fits perfectly in a 2" tri-clamp ferrule Replaces Stopper Sizes #10 , #11, #12 Stopper Measurements: 1.65" x 2.19" (42 mm x 55.5 mm) The flapper stopper protrudes roughly 2.5" from the stopper
$32.99
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BrewBuilt® CoolStix™ Stopper for Fermonster & PET Carboys
Please note: This stopper was designed for use with the BrewBuilt CoolStix which has been discontinued. Two of the holes are for an airlock and thermowell, but the third 1/2" hole was intended for the CoolStix and you will need to plug it or utilize it how you see fit. This #10 3-hole silicone stopper is used alongside the BrewBuilt CoolStix for Carboys. The holes are for a 1/2" CoolStix, an airlock, and a thermowell. The holes measure 0.500", 0.413", & 0.375" Compatible with Fermonsters and our Plastic PET Carboys listed below under "You Might Also Need".
$8.79
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Silicone Stopper | 20mm x 36mm | Solid
This versatile silicone bung is made from a food-grade, lead-free material, making it ideal for use with all food and beverages. Dimensions: Tapered Diameter: 20mm to 36mm (0.78" to 1.41") Solid stopper (no hole) KegLand Part Number: KL12829
$1.99
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Silicone Stopper | 20mm x 36mm | With Hole
This versatile silicone bung is made from a food-grade, lead-free material, making it ideal for use with all food and beverages. Dimensions: Tapered Diameter: 20mm to 36mm (0.78" to 1.41") Hole Diameter: 9mm (0.35") KegLand Part Number: KL12812
$1.99
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Silicone Stopper | 17.5mm x 22.5mm | With Hole
This versatile silicone bung is made from a food-grade, lead-free material, making it ideal for use with all food and beverages. It's the perfect size for sealing most standard beer bottles, making it a great option for micro and nano brewers. It also serves as a replacement airlock bung for the KegLand Bucket Buddy. Dimensions: Tapered Diameter: 17.5mm to 22.5mm (0.68" to 0.88") Hole Diameter: 9mm (0.35") KegLand Part Number: KL12638
$0.99
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$4.09
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Silicone Stopper | 32mm x 48mm | With Hole
This versatile silicone bung is made from a food-grade, lead-free material, making it ideal for use with all food and beverages. Dimensions: Tapered Diameter: 32mm to 48mm (1.25" to 1.88") Hole Diameter: 9mm (0.35") KegLand Part Number: KL12836
$4.99
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Silicone Stopper | 19.5mm x 28.5mm | With Hole
This versatile silicone bung is made from a food-grade, lead-free material, making it ideal for use with all food and beverages. Dimensions: Tapered Diameter: 19.5mm to 28.5mm (0.76" to 1.12") Hole Diameter: 9mm (0.35") KegLand Part Number: KL41669
$1.59
