You can use this for items other than water bottles, as long as they have detachable shoulder straps! It not only alleviates shoulder strain but also makes it easy to identify your belongings, which I think is very convenient ( ´∀｀) Length: Approximately 17-18cm Width of the strap passage: Approximately 4cm Shoulder strap cover bundle discount: 2 pieces...750 yen 3 pieces...1050 yen Please understand that these are handmade by an amateur☆