The 8 Best 38 MM Plastic Bottle Caps (2023 reviews)

Here, we present cap that manages to win our hearts. It's the fastrack glass jug and it's widely considered as one of all-around great cap you can buy. It is great for running test batches of your brews. It is glass so it won't hold smells, stain, or be food for bacteria. The loop on the outside of the bottle makes it easy to pick up and transport. The glass on this is pretty thick and high quality. It is great for keeping homemade wine. It would be ideal if there is a practical handle. The jug is very nice and sturdily built. It's really small to be realistically used. It is great 1 gallon carboy for running test batches of your brews.

Why We Like This:

Great for sun tea, easy to carry and poor from
Very heavy duty and thick glass
Delivers what they promise

Best With screw Top: Fastrack 38 MM Plastic Bottle Cap

Buy on Amazon

The fastrack 38 mm plastic bottle cap is satisfactory and appropriate and fits well with your daily usage. It is easy to fill with bird food and best of all, it is great for refilling a water bottle, environmentally friendly. These are glass jars so you have to be careful that you don't break them. This item includes 4 clear glass growlers, each 1 gallon with 18 poly seal caps that ensures proper sealing for fermenting your favorite drink.

These are sturdy and light enough to carry from room to room. They're sturdy and light enough to carry from room to room. The cap has a plastic coating inside. It can be refilled forever, they easily pay for themselves, at 39 cents for a refill, as opposed to spending over a dollar for a new jug of water.

Why We Like This:

Can be put in the car to refill water bottle
Very good quality of glass, will use them for distilled water
Looks great, feels heavy, does the trick

Best With screw lid: C packaging 38 MM Plastic Bottle Cap

Buy on Amazon

C Packaging line of cap come in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. These are glass jugs that can hold 128oz. It is heavy duty glass that is crystal clear for easy visibility. It provides air tight seal, and the finger handle makes carrying and pouring easy. It can just seal with a #6 stopper or a 38mm screw cap. The edge where the 2 glass halves join together are still sharp.

These jugs are suitable for storage of any liquid, including tea, juices, milk as well as other food & dairy storage applications. It is great for fermenting small batches of beer, wine, or mead, or storing overflow from a larger batch. This item is very Sturdy.

Why We Like This:

New and hot release
Delivers what they promise

Best For coquito: Domuen 38 MM Plastic Bottle Cap

Buy on Amazon

If you often find yourself confused about appropriate and satisfactory cap, domuen 38 mm plastic bottle cap is your end point. You can use these growler caps so your beer can go back to being enjoyed and taken on the go without leaking or loss of carbonation concerns. It is perfect for making new beer. It is made from low density polyethylene to provide good torque retention, help to preserve the freshness of your finest craft brews, reusable and durable for long lasting use.

These caps help this beer stay carbonated in these growlers for several days. They fit 1/2 and 1 gallon glass jugs, so you can measure your bee skep glass bottles and ensure if they fit. It does have a good gasket on the caps.

Why We Like This:

Works 32 and 64oz beer bottles
Much better than metal caps that have a tendency to rust
Perfect replacement, it screws on easily and has a tight seal
Easy to clean and for perfectly

Best For Hard cider: DESIYUE 38 MM Plastic Bottle Cap

Buy on Amazon

The desiyue 38 mm plastic bottle cap is suitable and reliable and fits well with your daily usage. The finger hole size of this 1/2 glass gallon jug fits one finger. It fits in the bottle and a black piece that screws on. The Jugs come well packed, they are really thick and sturdy, and the handle makes it much easier to move around. It also comes with a plastic plug. There is a rubber or silicone, insert, and then a plastic cap that screws over. It will definitely help you increase your water totals.

Why We Like This:

Nice jug, lightweight cap and neck-plug
Lot of satisfied buyers

Best For Glass Bottles: Home Brew stuff 38 MM Plastic Bottle Cap

Buy on Amazon

The home brew stuff 38 mm plastic bottle cap is the best convenient cap on the market today. It fits most 1/2 gal sized growlers and 1 gal glass jugs. It is perfect for glass bottles. It is designed with a foam layer inside to prevent rust issues and for a better seal. The best thing about these lids is that the bottle does not leak when laying on its side. It fits 1gallon perfectly additionally it is easy to reuse and clean. It comes in multiple quntities to keep extra on hand just in case.

Why We Like This:

Has a coated liner to prevent rust and provide a better seal
Good brand reputation

Best For Bottle conditioning: ferment Nation 38 MM Plastic Bottle Cap

Buy on Amazon

The ferment nation 38 mm plastic bottle cap is capable of outshining several other cap featured in this list in overall features in its price range. It is superior to the traditional metal growler caps with a wax or rubber liner because they can be used multiple times without developing air leaks. These caps keep the beer very fresh. It is used to ferment kombucha in reused gt bottles. These caps have molded lines around the edge of the lip which makes it easier to open a bottle because you can get a better grip on them.

These black caps are made of low-density polyethylene to provide excellent torque retention. They don't leak, rust, or get stuck on the growler. It provides an excellent seal against the container.

Why We Like This:

Perfect fit for growler, and easy to clean
One of the new comers and featured product

Best With locking lid: craft A Brew 38 MM Plastic Bottle Cap

Buy on Amazon

If you are going to stick with your local brewery's growler, this addition will help you keep your beer fresh. These growler caps fits perfectly with a nice tight seal. It is great for breweries, distributors, and any other establishment selling and filling growlers.

It is made of black plastic with a poly-cone liner inside, and the caps fit most standard size (64-ounce) glass growlers. The clear part pops off so you can scrub the whole thing too. These caps are sturdy and the poly-seal interior to the cap is fitting inside the cap itself securely. The seal is much tighter and won't bend or rust over time.

Why We Like This: