The same Hydro Flask insulation and durability you love in a sleek, lightweight design. Flip it and sip it with the Hydro Flask Lightweight Bottle With Flex Straw Cap. With a comfortable, perforated, airy strap, the closeable, leakproof straw cap is easy to open and close with one hand, for on-demand hydration. The smooth, sleek bottle easily slides into bags and totes while keeping your drinks cold up to 24 hours.