All bottles age, and so do their caps – even the TWIST bottles are not magic. If the old bottle is still fine, but the cap is worn down, chewed up, or starting to leak, simply replace it with the bottle cap suitable for TWIST bottle 590.
- Replacement bottle cap with high flow, self-sealing and leak-proof valve.
- Includes removable dust cap.
- Suitable for TWIST bottle 590 and 450 deluxe models. Not compatible with the 600 or 1st gen 450 models.