The "Determined to Dominate" shaker cup is brought to you by the creators of the "PerfectShaker". This lightweight but resilient shaker is 100% leak proof with an extra strong bottle design. Take it with you on the go with its compact build that fits into most cup holders. It is dishwasher safe & easy to clean. You will enjoy smooth and delicious mixes every time with it's one of a kind rod and ball design.