16 OZ LIGHTWEIGHT EMERALD GREEN BOTTLE: A sleek, lightweight stainless steel insulated water bottle with Hydro Flask insulation and durability. The leakproof Lightweight bottle features a perforated, airy style and leakproof, chug cap. 24 HOURS COLD: These insulated stainless steel water bottles keep drinks cold for 24 hours thanks to double-wall vacuum insulation. Hydro Flask water bottles feature TempShield insulation, designed to be lightweight and efficient temperature retention, keeping contents chilled all day. LEAKPROOF: Say goodbye to leaky reusable water bottles. The Lightweight Chug Cap is leakproof when closed. Simply close it shut and toss it into your bag, or use it as a travel water bottle without worry. Rest easy knowing your drink stays securely sealed all day. PURE TASTE: Durable pro-grade stainless steel ensures pure taste and no leftover flavor transfer from this insulated metal water bottle. So, today's water won't have any taste of yesterday's iced tea. LIGHTWEIGHT: The Lightweight reusable water bottle features perforated, flexible straps with aluminum flex pivots. The airy design accents the sleek, lightweight technology of the stainless steel water bottle.