The BlenderBottle Strada Stainless Steel Twist is the premium protein shaker bottle that will replace all of the cheap, flimsy bottles that have been pushed to the back in your kitchen cabinet. Keep your protein shakes or water at the perfect temperature for hours with the double-wall vacuum insulated stainless steel. Each shaker includes measurement markings so you can be precise with your protein intake and a rounded base for smoother, clumpless mixing. The lockable spill-proof lid opens and closes with just a quarter-turn twist and the ergonomic carry loop is comfortable to hold as you move throughout the gym.