Thank you for viewing! Children's water bottles and water bottle covers are surprisingly expensive. But kids use them constantly, so they get tattered quickly... This is a helpful item for those times! ☆Simply attach it to the bottom of your water bottle cover to prevent the bottom from falling out☆ Washable and reusable. Simple design that blends with any cover♪ Elastic and durable, making it economical! 【Product Specifications】 This product is not the water bottle itself, but an attachment for the water bottle cover. ・Can be used with Hydro Flask and Thermos. ・Color: Black ・Material: Silicone ・Size: Diameter 9cm, Height 4.2cm, Thickness 2mm ※It will fit most standard sizes (0.8~1.0L), but please be sure to check the size. ※Using double-sided tape will increase the strength. (Not included) ※If it doesn't fit, you may be able to use it by adding thickness to the cover with sponge tape, etc. <Product Condition> New and unused. There may be minor scratches or stains. ※The product has been opened once to check its condition. ※Please note that the color in the images may differ from the actual product depending on your browser and settings. ※Please refrain from price negotiations.