FuelshakerPro is an innovative Shaker Bottle developed by Fuelshaker. What makes the FuelshakerPro unique is in its Patent Pending Storage and Release System, the Fueler. You put the powdered supplements inside of the Fueler, placing the agitator cap on top to seal it shut. The Fueler is then screwed into the open bottom of the cup, for a quick and easy solution to carrying supplements. It is this open bottom that also makes the FuelshakerPro unique. Shaker bottles are almost always smelly and very hard to clean. With the open top and bottom, along with the rounded edges everywhere, cleaning it is a breeze! The Eastman Tritan material that the cup is made of also makes it very durable and odor resistant. To go along with this, the FuelshakerPro has an ergonomic build thanks to its Silicone grip on the Fueler, along with the silicone covered lid. The cap also comes with a convenient screw cap. Now you can go in style wherever you go workout, with the convenience of carrying less things with you!