Answering the common search for 64 oz growler caps, this guide highlights top 38 mm caps that fit most 1/2 gallon to 1 gallon growlers and glass jugs. Each pick emphasizes a tight seal, durability, and ease of use. Best for home brewers, kombucha lovers, and casual beverage storage. The table below compares key options at a glance.
| Product | Cap Type | Best For | Notes |
|---|---|---|---|
| Patelai 144 Pieces 38 mm White Growler Caps | Tinplate Screw Caps | Heavy-use households | One-time use; strong seal |
| Patelai 36 Pcs 38 mm White Growler Caps | Tinplate Screw Caps | Limited batches | Same sealing principle; smaller pack |
| DOMUEN 12 Pack 38mm Growler Caps | Poly Seal Screw Caps | Frequent replacements | Low-density polyethylene liner for seal |
| The Kombucha Company Metal Growler Caps (12 Pack) | Metal Caps w/ Plastisol Liner | Kombucha, beer, homebrew | Continuous Thread; USA-made |
| The Kombucha Company Metal Growler Caps (3 Pack) | Metal Caps w/ Plastisol Liner | Occasional use | Same design; smaller bundle |
Patelai 144 Pieces 38 mm White Growler Caps
The Patelai 144-piece set uses sturdy tinplate lids with a white filling glue for a strong, air-tight seal. Designed for 1/2 gallon and 1-gallon glass jugs, these caps are intended as a single-use closure with dependable leakage prevention and carbonation control. The textured edge aids grip for easy tightening. Best for high-volume bottling or shared households where multiple batches are prepared. Limitations include non-reusability, which can increase replacement needs over time.
- Best for: high-volume bottling and frequent use.
- Why selected: large pack ensures stock for multiple containers and sessions.
- Caution: not reusable; plan for refills and replacements.
Patelai 36 Pcs 38 mm White Growler Caps
This smaller Patelai set uses tinplate caps with white filling glue and an easy-teeth edge for straightforward screwing onto 1/2 gallon and 1 gallon jugs. The cap design emphasizes a tight seal to prevent leaks and gas escape, supporting longer freshness for beverages and foods stored in growlers. Best for solo brewers or small households with limited bottling needs.
- Best for: occasional bottling and smaller batches.
- Why selected: compact package reduces storage and waste.
- Caution: single-use; evaluate future needs if bottling frequently.
DOMUEN 12 Pack 38mm Growler Caps
The DOMUEN 12-pack features 38 mm poly seal screw caps with a high-quality liner designed to fit 1 gallon and 1/2 gallon jugs. Made from durable LLDPE, these caps offer strong torque retention and are reusable for long-term use. The raised ridge around the rim makes gripping easier, while the liner preserves carbonation and prevents rust. Best for home brewers seeking reusable closures; limitation: liners are not metal, which may matter for certain storage conditions.
- Best for: reusable, budget-friendly sealing.
- Why selected: emphasizes durability and resealability.
- Caution: plastic liners may wear with repeated hot-fill cycles.
The Kombucha Company Metal Growler Caps (12 Pack)
These metal growler caps from The Kombucha Company are made in the USA and use a durable plastisol liner to create a tight seal with 1.5″ (38 mm) continuous-thread caps. Suitable for kombucha, beer, homebrew, cider, and other beverages. The plastisol liner forms an airtight seal after warmth, helping preserve freshness and prevent leaks. Best for frequent use with glass growlers; limitation: liners may require replacement after long storage periods.
- Best for: kombucha and craft beverages needing a reliable seal.
- Why selected: US-made, strong material, proven lid design.
- Caution: plastisol liner wears with repeated high-temperature exposure.
The Kombucha Company Metal Growler Caps (3 Pack)
This 3-pack from The Kombucha Company mirrors the 12-pack design, offering a practical option for limited or spill-prone uses. The 1.5″ diameter caps with a plastisol liner deliver a secure seal for glass growlers and jugs. Best for backups or travel-friendly setups; limitation: smaller bundle may require more frequent restocking for busy households.
- Best for: backup caps or small households.
- Why selected: identical performance to larger packs, with fewer units.
- Caution: lower quantity means more frequent purchases if you bottle often.
FastRack 38mm Poly Seal Screw Caps (2 Pack)
The FastRack 2-pack provides a practical option for quick replacements. These 38 mm poly screw caps are designed for popular 1/2 and 1 gallon growlers and beer, wine, or homebrew containers. They’re a simple, airtight choice that supports on-the-go storage without heavy investment. Best for: occasional replacements; limitation: only two caps per pack.
- Best for: quick, affordable replacements.
- Why selected: compact option with straightforward sealing.
- Caution: limited quantity per purchase may require frequent reorders.
Buying Guide: Choosing The Right 64 Oz Growler Caps
- Cap material and seal quality: Tinplate caps offer strong seals but are typically single-use, while plastic liners provide reusability. Consider your bottling frequency and storage conditions.
- Size and compatibility: Most 38 mm caps fit standard 1/2 to 1 gallon glass growlers. Confirm neck finish and thread type (CT) to ensure a proper fit.
- Liner type: Plastisol liners form airtight seals and are common in metal caps. Liners can affect heat tolerance and reusability; choose according to beverage type and storage duration.
- Durability and use case: For frequent or long-term storage, reusable caps with durable liners are preferred. For single batches, tinplate caps can be cost-effective.
- Made in USA considerations: If domestic sourcing matters, seek options that note USA-made components and compliant materials.
Common Scenarios
- Homebrewing and beer storage: Opt for metal caps with plastisol liners for a reliable seal and gas retention.
- Kombucha and cold-fermented beverages: Look for liners that tolerate acidic contents and frequent opening without losing seal integrity.
- Travel and portability: Choose caps with easy grip edges and consistent threading to prevent leaks during transit.
FAQ
- What does 38 mm mean for growler caps?
38 mm refers to the cap diameter, matching standard 1/2 and 1 gallon growlers. - Are tinplate caps reusable?
Most tinplate caps are intended as single-use closures; reuse can compromise seal integrity. - Which cap is best for kombucha?
Metal caps with plastisol liners are common; they provide a strong seal and are designed for repeated use. - Do these caps fit all glass growlers?
Most 38 mm caps fit standard 38 mm neck finishes; verify thread type and neck finish for compatibility. - Is USA-made preferable?
For certain buyers, USA-made options offer supply-chain familiarity and perceived quality control. - How many caps should I buy?
Estimate your bottling schedule. For frequent use, choose larger packs or refillable options.