The edge of the mouth is loose and fluttering, and a large hole is open at the top. Please connect the parts with pins and use them. When using the pins, it will come off, so please put a sign (6-7 mm) in between, or round the tip to a larger tip. There is a property that the color changes from pink to blue depending on the light source such as solar and fluorescent lamps. * Because it is handmade, there are individual differences in the shape of the parts and the size of the hole. There may be a difference of + -3mm. Please note.