This is a cute pink mezzo piano pet bottle cover. The inside is an aluminum vapor deposition sheet, which also has a cooling effect. I have uploaded photos of a 500ml pet bottle inside at the end. It fits snugly around the neck of the pet bottle. I tried it with pet bottles I have at home, and while 500ml bottles, whether round or square, fit, it's a snug fit for 500ml, so 650ml bottles won't fit. There are stains, like spots, on the top and bottom of the cover in shades of pink. At first glance, they look the same pink, so you might not notice, but upon closer inspection, you can see the different shades. Please check the photos. I would like to sell this to someone who is satisfied with the condition. Shipping will be in simple packaging via Mercari delivery. mezzo piano mezzo piano Pet bottle cover Pink Perrier-chan 599~