: Our standard size straw caps are compatible with standard size bottles, ID: 12 ounces (about 340.2 grams), 18 ounces (about 510.3 grams), 21 ounces (about 680.4 grams) compatible, compatible with classics Kanteen water bottle. Possible compatibility: There is a 1.8 inch (about 4.6 cm) screw mouth diameter in the stainless steel bottle. The perfect solution for out-of-office water replenishment needs. Flip the top cover, drink, and drink with one hand. There is no need to unscrew the straw cap. Made of high-quality materials, it not affect your taste. No , easy to clean and healthy. Mobilization, outdoor, hiking, campers, hunters, biking, football, jogging, running, football. Trim the straw to fit your standard saliva bottle; the alloy carabiner is perfect for placing items, suitable for hanging on bags and ropes, etc.