Hydro Flask 21 Ounce Standard Mouth - Lake Superior Engraved

S21SXLS Hydro Flask 21 Ounce Standard Mouth - Lake Superior Engraved Hydration on the go. Stainless steel, cup holder compatible, fits right in your pack-Hydro Flask's resusable, refillable 21 oz. Standard Mouth insulated water bottles keeps cold drinks cold for 24 hours, hot drinks hot for up to 12 hours, and holds enough hydration for hours of fun. This listing is ONLY for specially-engraved bottles, which feature a silhouette of Lake Superior.