Yeti's Rambler Bottles come in all the sizes you need. Choose from 18 oz, 26 oz, 36 oz or 64 oz on the go bottles Rambler bottles. The Rambler 18 and 26 oz is perfect for short hikes or taking to work or school. Rambler 36 and 64 oz bottles are for that weekend outdoor adventure where you want to make sure you have plenty of fluids with you. As with all Yeti's great drinkware, these bottles are extra tough and made from double walled stainless steel to keep your cold drinks cold and your hot drinks hot. Grab one of each of these great YETI Rambler bottles.