Swing Top Bottles: Sizes, Gaskets and Wholesale Buying

What is a swing top bottle?

A swing top bottle has a special finish molded to accept a wire bail. The closure has four parts:

• Wire bail: A formed steel wire that clips into holes or a groove on the bottle neck.
• Lever: The part you flip up to open and press down to close.
• Stopper: A ceramic or food-grade plastic plug attached to the bail.
• Gasket: A rubber or silicone ring on the stopper that seals against the glass.

When you push the lever down, the bail pulls the stopper tight onto the mouth, compressing the gasket. The bottle seals without threads and opens without a tool. That makes swing tops ideal for products the consumer opens and closes many times. For a broader look at how closures attach, see bottle neck finishes explained.

What sizes do swing top glass bottles come in?

Swing top glass bottles come in a wide range of capacities. US buyers often search in ounces, while most bottles are made in metric sizes.

Small swing top bottles of 150 to 250 ml suit gifting and tasting kits. The 500 ml size is the most common single-serve format for craft beverages, and 750 ml to 1 liter bottles are used for sharing sizes and table water.

Can swing top bottles hold carbonation?

Swing top beer bottles and soda bottles have been used for carbonated drinks for a long time, so the closure itself can work under pressure. Whether a specific bottle can hold your product depends on several things:

• Bottle design: Bottles intended for beer and soda are made with suitable wall thickness and round cross-sections. Decorative, square or very thin bottles may not be designed for internal pressure.
• Gasket condition: A worn, dry or misaligned gasket leaks gas long before the glass is at risk.
• Bail tension: A loose bail does not compress the gasket enough.
• Temperature: Pressure in a carbonated bottle rises as it warms, for example in a hot truck or on a sunny shelf.
• Fermentation in the bottle: Bottle-conditioned beer and second-fermented kombucha keep producing gas. Over-carbonation is a real breakage risk.

Ask your supplier whether the bottle is intended for carbonated beverages, then fill samples at your target carbonation, store some warm, and check for leaks and breakage before you approve production. Our kombucha bottles guide covers second fermentation in more detail.

What are swing top bottle caps and gaskets made of?

Swing top bottle caps (the stoppers) are usually ceramic or plastic.

• Ceramic stoppers feel heavy and traditional. They can be printed or glazed with a logo.
• Plastic stoppers are lighter and cheaper, and they come in many colors for flavor coding.

Gaskets are usually natural or synthetic rubber, or silicone. Silicone tolerates heat and repeated washing well, while rubber gaskets are common and inexpensive. Both are wear parts. Refill programs should replace gaskets regularly and keep spares in the correct size.

The wire bail is typically steel, often zinc-plated or stainless. Check that the bail finish suits your product's environment, because a damp cellar or wash line can corrode cheaper wire over time.

What are swing top bottles used for?

Brands choose flip top glass bottles when resealability and reuse are part of the product story.

• Craft beer and cider: The classic use, especially in 500 ml and 750 ml sizes. See the beer bottles guide for crown-cap alternatives.
• Kombucha and fermented drinks: Popular with home brewers and small producers.
• Lemonade, juice and cold brew: Clear glass shows the color, and the cap reseals in the fridge.
• Water: Restaurants and hotels use 750 ml and 1 liter swing tops as refillable table water bottles.
• Oils, vinegars and syrups: Small sizes work well, though a pourer may control flow better.
• Liqueurs and gifts: Small swing top bottles are popular for homemade-style limoncello and gift sets.

What about latch top jars and gasket jars?

Clear glass jars with lids with a latch use the same principle as a swing top bottle: a wire clamp presses a glass lid onto a rubber gasket. They are sold as latch top jars, swing top jars, flip top jars or gasket jars, and they are used for dry goods, preserves, fermenting and pantry storage.

Latch jars are a different product from swing top bottles, with a wide mouth and a hinged glass lid. They are not stock items at Mars Glass, but they can be quoted as sourced items. For food storage jar options, read our guide to glass storage jars and canisters.

How do you buy swing top bottles wholesale?

Swing top bottles wholesale are supplied with the closure fitted, which affects cost, packing and checks.

1. Choose size and glass. Flint is the standard; super flint gives extra clarity. Colored glass is available on some stock items.
2. Choose the stopper and gasket. Decide on ceramic or plastic, stopper color, and gasket material. Ask for the gasket specification so you can reorder spares.
3. Decide decoration. Screen printing, decals and frosting work well on swing tops. A printed ceramic stopper adds branding at the top. See customization for options.
4. Order samples. Fill them with your product, open and close them many times, and run warm storage and inversion tests.
5. Plan packing. Bottles with bails fitted need dividers or layer pads so the wire does not scratch neighboring bottles.
6. Check production against the approved sample, including bail tension and gasket seating.

Small swing top glass bottles and large ones often run on separate molds, so lead times can differ by size. Confirm all sizes in one quote if you plan a range.

Key takeaways

• Swing top, flip top and pop top bottles are the same closure type: a stopper on a wire bail with a gasket.
• Common sizes run from 150 ml to 1 liter; a "16 oz" swing top is usually 500 ml (16.9 fl oz).
• Only use bottles designed for carbonated drinks for beer, soda or kombucha, and test filled samples.
• Gaskets are wear parts; specify the material and keep spares.
• Latch top jars use the same principle but are a separate product.
• Wholesale swing tops ship with closures fitted, so plan packing and inspection accordingly.

How Mars Glass can help

Mars Glass supplies stock swing top glass bottles from 150 ml to 1 liter in flint, super flint and colored glass, with decoration and samples before mass production. Listed MOQs start at 5,000 pieces.

• Swing-top glass beverage bottle, 200–1000 ml
• Swing-top flint glass beverage bottle, 150–1000 ml
• Swing-top flint and super flint bottle, 250–750 ml
• Request samples or a quote

Frequently asked questions