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Get leak-proof portability with the Standard Mouth Loop Cap bottle accessory. The Standard Mouth Loop Cap fits Hydro Flask 12 oz and 21 oz Standard Mouth water bottles (sold separately), is BPA-free, and 100% recyclable. The large loop makes for easy attachment and carrying.
NOTE: The Hydro Flask Standard Mouth Loop Cap will NOT fit Wide Mouth Hydro Flask bottles.
- Fits 12 oz and 21 oz standard mouth water bottles
- Leak proof seal
- BPA free
- 100% recyclable
- Lifetime warranty