This Official Amsterdam Bulldog grinder is a 3-piece, Black, Green/is a little darker in colour than the picture, Clear and Blue, pink. plastic grinder that is decorated with the iconic Bulldog face and the words The Bulldog and Amsterdam on its lid. These great lightweight grinders have magnetic closure and come with what’s known as shark or pyramid shaped teeth that effortlessly crush and grind your tobacco or herb mix into the desired texture.