This is a water purification bottle purchased from Montbell several years ago. I used it for about a year when I was stream climbing, and it has been stored in a toolbox since then. I'm selling it because I don't have a chance to use it. I will also include an unused cartridge. Although this product is no longer sold, there are similar products available, so please check the website for details. https://webshop.montbell.jp/goods/list.php?brand_id=396 Size: 24cm (height) x 7.5cm (width) Weight: 314g *All measurements are approximate. Price: Bottle: Around 10,000 yen (I think) Cartridge: 4,180 yen *Based on current price Please understand that this is a used item before purchasing. No returns or exchanges, please.