Quick answer
Choose the cap that matches your bottle: the PET cap fits Aarke PET bottles, and the glass cap fits Aarke glass bottles for Carbonator Pro. They are not interchangeable, so check your bottle type before buying.
Why compatibility matters
Aarke water bottles come in different materials, and each cap is designed specifically for its bottle type. Using the wrong cap may not create a proper seal, which could lead to leaks or difficulty closing the bottle.
The PET cap is a direct replacement for the original cap on Aarke PET bottles, while the glass cap is designed for use with Aarke glass water bottles for Carbonator Pro. Always verify your bottle model before ordering.
Material and durability
Both caps feature stainless steel construction, which gives them a sleek look and durable feel. The material is the same, but the fit and design are tailored to the respective bottle necks.
If you own multiple Aarke bottles, you might be tempted to swap caps, but the different neck sizes and threading mean they are not universal. Stick with the cap designed for your bottle to avoid frustration.
Trade-offs to consider
- Fit precision: Each cap is engineered for a specific bottle type. The PET cap fits PET bottles only, and the glass cap fits glass bottles for Carbonator Pro only. There is no universal fit. Check the bottom of your bottle or its original packaging to confirm which cap you need.
- Material consistency: Both caps are stainless steel, so you get the same durability and aesthetic regardless of choice. The difference lies in the threading and neck design. If you already have a stainless steel cap that works, you don't need to upgrade for material reasons.
- Cost and value: Both caps are priced at USD 5.60 (compared to USD 8.00), making them an affordable replacement. The value depends on which bottle you own. Buy the cap that matches your bottle to avoid wasted spend on an incompatible part.
Product facts at a glance
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Glass Water Bottle Cap: Sleek stainless steel spare cap with a pressed Aarke logo, designed for use with Aarke glass water bottles for Carbonator Pro. If you own a glass bottle for Carbonator Pro, this cap is the correct replacement to maintain a proper seal and look.
Glass Water Bottle Cap
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PET Water Bottle Cap: Stainless steel spare cap compatible with Aarke PET water bottles, designed as a direct replacement for the original. For PET bottle owners, this cap ensures a snug fit and keeps your bottle sealed for everyday hydration.
PET Water Bottle Cap
Which cap should you choose?
Best for
- Aarke PET bottle owners who need a direct replacement cap
- Aarke glass bottle owners with Carbonator Pro who want a matching spare cap
Not for
- Anyone looking for a universal cap that fits both PET and glass bottles
