Hydro Flask Medium Packable Bottle Sling Dew Medium. The Packable Bottle Sling keeps a low profile when not in use but stays light when you need hands-free hydration. Specifications for Hydro Flask Medium Packable Bottle Sling: Manufacturer: Hydro Flask Color: Dew Size: Medium Gender: Unisex Age Group: Adults Features of Hydro Flask Medium Packable Bottle Sling Fits 32 oz and 40 oz Wide Mouth Bottles Adjustable strap for shoulder or crossbody carry Packs into own pocket for easy storage and travel Stretch mesh pockets Package Contents: Hydro Flask Medium Packable Bottle Sling Hydro Flask PBSM441: Medium Packable Bottle Sling Dew Medium