Defective item. See photo 5. There's no problem with using it, so if you don't mind, please consider it. This is a handmade water bottle cover. For custom orders, the button might be a round button. The lining is made of aluminum. See photo 4. Photo 1 shows a 680ml bottle, and photo 2 shows a 500ml bottle (I'm not sure if it fits all bottles). It has a tag, so you can attach your own shoulder strap, etc. I'm also selling handmade shoulder straps, so please consider them together. When not in use, the gusset can be folded for compact storage. See photo 3. Price: 500 yen each. 50 yen discount for combined shipping. Prices may vary depending on the fabric. This is just a hobby of a housewife, so please forgive any imperfections. Please purchase from a store or a professional if you are particular. Reichin Handmade Shinkansen (bullet train), train, car, steam locomotive, vehicles, bus, Komachi, Hayabusa, Doctor Yellow, work vehicles, construction vehicles, emergency vehicles, fire truck, ambulance, police car, dinosaur, animal, insect, beetle, stag beetle, animal, camouflage, stars, space, planets, soccer, fish, aquarium, whale, dolphin, whale shark, turtle, unicorn, Pegasus, strawberry, fruit sandwich, candy, cake, cupcake, shortcake, chocolate, macaron, ice cream, ribbon, polka dots, teardrops, stripes, bear, rabbit, merry-go-round, dress, sunflower, watermelon #ReichinHandmade