What Our Gearhead® Experts Are Saying:"This is my everyday hydration hero—it’s huge, durable, and keeps my water cold for over a full day. The updated Straw Lid 2. 0 doesn’t leak at all and makes it super easy to sip without unscrewing anything. Whether I’m on the trail or at my desk, this bottle goes everywhere with me."The Hydro Flask 40oz Wide Mouth Straw Lid 2. 0 Bottle is made for big adventures and bigger thirsts. Featuring TempShield® double-wall vacuum insulation, it keeps drinks cold for up to 24 hours or hot for 12, so you’re always fueled and refreshed no matter where the day leads. The wide mouth makes adding ice effortless, while the leakproof Straw Lid 2. 0 offers easy sipping on the move without spills. Built from pro-grade stainless steel for lasting durability and pure flavor, it’s designed to resist dents, odors, and flavor transfer. Finished with Hydro Flask’s Color Last™ powder coat, this bottle offers a comfortable, slip-free grip that stands up to everyday use—whether you’re summiting peaks or heading to the gym.