Thank you for viewing! ※Images 5, 6, and 7 are reference images for usage. This is a pocket that attaches to a school backpack and can hold a water bottle, recorder, folding umbrella, etc. ♡ It can fit water bottles up to 7.8 cm in diameter. If the height is around 24 cm, you can use it by tightening the drawstring. Carrying a heavy backpack and a water bottle over the shoulder seems difficult... Also, in the hot season, two water bottles are needed. I thought of this and repeatedly prototyped it to make it easy to use. The sides are secured with Velcro, and the bottom is attached to the backpack's hardware for fixing. The material is padded with cotton, making it sturdy and fluffy. It's made of fabric, so it's light and can be flattened, fitting easily into the backpack storage area. I hope you'll try it! This is handmade. Also, it will be shipped in a flattened state, so please understand this before purchasing. Keywords: Nubby, Korea, school backpack, water bottle, Korean style, tulip