The YETI Rambler 64 oz Water Bottle With Chug Cap is a big water bottle for long adventures. The double-wall vacuum insulation keeps drinks cold or hot, depending on how they enter. The best part is, at 64 ounces, you won't have to stop for refills quite as often. Especially handy when you're off on the boat or have a long day of mowing ahead. The chug cap is leakproof, so everything stays inside until you're ready for a sip.