The glazes have a waterfall affect.  All glazes are food safe. The lid is made and manufactured in the US; it is a part unto itself and is BPA free; it can be microwaved and even put in the dishwasher. It is leak proof with a seal and locking mechanism. The mug is also microwave and dishwasher safe. The mugs fit in any standard car cup holder and hold 16 oz. Food safe, microwave save (lid/sleeve/mug), and dishwasher safe.