Need to carry more water, but don't want to carry two bottles or a hydration bladder? The Nalgene Silo packs a whopping 48 oz. of water into the regular Nalgene bottle diameter so it still fits in the side pocket of your pack, If you're looking for a water bottle that will keep you well hydrated, hold up against bangs, bumps, and drops, and not leak a single drop ever, then the iconic 48-ounce wide mouth is your water bottle. There's a reason why we haven't changed its design in decades—because it works (extremely well), Easily add ice or clean up after transporting juice or sports drinks. Made of super-tough Eastman Tritan polycarbonate, the Tritan offers the same roomy interior as most Nalgenes so it's super tough and nice looking too, and a cap that never gets lost. In addition, the bottle's BPA-free construction is impact-, odor-, and stain-resistant, helping it withstand a wide range of temperatures (from -40 to 212 degrees F) and last for years. Finally, the bottle includes printed graduations on the side, making it easy to measure water quantities. Recommended for extreme adventures, the Tritan bottle is available in a variety of vivacious colors. Nalgene was founded in 1949 as a manufacturer of the first plastic pipette holder. The company soon expanded its product line to include state-of-the-art polyethylene labware under the Nalgene brand. By the 1970s, outdoor enthusiasts had discovered the taste and odor-resistant, leakproof, and rugged properties of Nalgene's large selection of plastic containers. In response to this emerging demand, Nalgene created a Consumer Products Division. In the ensuing years, Nalgene created a full line of bottles that were perfect for storing everything from water to powdered drinks to pancake mix to shampoo.