This Shaker To Go from Sistema is the perfect solution for making your shakes on the move. When shaken the grooved base helps to agitate powder mix drinks, while the spiral spider not only breaks up the powder it also will aerate the liquid. It has an inserted grip for secure handling and an internal thread so the base can be comfortable used as a drinking cap. The flip-top sipper features a rubberized seal. BPA free. Freezer safe, microwave safe without the lid and top rack dishwasher safe. Color: Clear.