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It must be with your missing sock.
Your water bottle's original cap could be anywhere from Acadia to Yosemite, and instead of searching every rock on each peak, you're going to opt for Hydro Flask's Standard Mouth Flex Cap. Its stainless steel construction includes Honeycomb insulation to help you drinks stay cold or hot longer. The flexible loop is durable and convenient for hikes and bikes to summer concerts.
- Water bottle cap fits Hydro Flask Standard bottles
- Stainless steel construction with Honeycomb insulation
- Flexible loop ideal for outdoorsy adventures
- Item #HYF001P