Running Handheld Water Bottle 12 oz Soft Flask – Hand Water Bottle For Runners, Hiking, Skiing & Outdoor Activity – Fits F2, F2, F3 & F4 Collapsible Flask – Hydration Holder with Pocket

From the model

CUSTOMIZED FITLY SOFT FLASK INTEGRATION: Your final companion for staying hydrated throughout runs, path working, marathons, hikes, exercises, and intense actions. Our handheld water bottle for working has been tailor-made solely for Fitly Flasks (F1, F2, F3, F4), guaranteeing a comfortable match and eliminating any pointless bulkiness. With the included F3 350ml flask and the choice to swap with different FITLY flasks, you will have versatile hydration options at your fingertips.