Blender Bottle Classic, Assorted Ounce and milliliter markings; Makes it super easy to measure stuff too Uses surgical stainless steel for the Blender Ball; So metals wont leach into your drink PLEASE NOTE: This package includes 1 bottle in one of the assorted colors shown No electricity or batteries required; And they work even better than electric shaker bottles Very secure screw-on lid and cap; Never leak liquids on your shirt again