Show that you are working towards getting to the next level with an Official VANTRITION Stainless Shaker Bottle. Marked with lines to help you measure your liquid for mixing. Stainless is easy to keep clean, doesn't keep that protein smell when you leave the used shaker in your vehicle, and is durable, even for big dogs. Step up to our top of the line shaker. You'll be glad you did. See you in the gym.