This BPA free bottle includes a shaker ball inside to help blend supplements or flavor powders together with liquid. It has a flip top with a wide mouth opening, as well as a screw on/off lid. There are embossed measurement markings on the side from 4oz to 20oz, as well as 100ml to 600ml, but it can hold up to 28oz of liquid. Quantity ordered must be in increments of 35pcs.