High Quality Protein Shaker Bottle: Stainless steel protein shaker bottle body with mixing ball to help completely dissolve powder in water without caking, for mixing protein powder shakes, martinis, cocktails, smoothies, juices, fitness, outdoor sports and supplements. Visible Window & Large Capacity: shaker cup With a big capacity of 28 oz ( measurement only goes to 24 oz /700 ml). Visual measurement window for easy observation of the drink volume, makes mixing drinks easy. 100% PBA-Free: shaker bottles uses kitchen grade 304 stainless steel and tritan material for protein shakes , PBA-free , for human safety and health. The stainless steel shake cup: from powder, robust, reusable and free from odours. No more plastic bottles, but a durable shakebe! Ideal for taking with you to sports, work or school. Leak-Proof & Easy to Port: Shaker Bottles for Protein Mixes with non-slip rotary opening lid for strong sealing and no leakage, flexible handle on the cap easy to carry, perfect for Gym fitness and workout.