The lid opens with one touch. Since the main body has a spiral shape of black, it is easy to understand how much dirt was removed. Three sets of 200 bottles per box.ワンタッチで蓋が開きます。本体が黒色の螺旋形状なので、どのくらい汚れが取れたか分かりやすい。1箱に220本入りが3セット。