The 750 ml/26oz size bottles are our most popular size. They easily fit into vehicle cup holders making them the best choice for drinking while travelling. They are ideal for taking to the office, gym, school. With the addition of a thermal cozy with hiking straps these bottles are ideal for hiking and walking. The wide mouth makes this bottle best suited for adding ice. We recommend this bottle for chlorinated water, smoothies and other acidic liquids because of the 304L grade stainless steel. A wide mouth bottle is also recommended for use with the alkaline water wand. Combo packages are a great way to save money. We have bundled some of our most popular packages to help you keep more money in your pocket.