Blender Shaker Bottle with Classic Loop Top(BPA Free),Protein Powder

2 BOTTLES OF 16 OZ(400ML) MEASURE LINE,FILL UP TO 20 oz EACH Patented mixing system uses 316 surgical-grade stainless steel BlenderBall wire whisk found only in BlenderBottle brand shaker bottles Screw-on lid creates leak-proof seal, and flip cap snaps securely shut to keep contents contained; loop top for easy carrying or attaching keys Wide mouth makes it easy to add mix scoops and liquids, and embossed markings measure both ounces and milliliters BPA and phthalate-free, dishwasher safe