1.GREAT FOR TAKING A SHAKE ON-THE-GO: Take a protein shake with you to the gym or create a delicious weight loss breakfast smoothie on your way to work/school and pour it into one of these shaker tumblers. 2. COME IN HANDY WHEN IN THE KITCHEN: Our portable plastic drinking cups with lids are not just for shakes and smoothies. Theyre great for anyone that likes to cook too The lids create a leakproof seal, so you can mix up delicious homemade salad dressings and sauces. 3.MADE FROM PREMIUM, SAFE MATERIALS: The handheld portion container bottles are made from top-grade, BPA-free plastic thats highly resistant to cracks and warping. Theyre dishwasher safe too Wash the bottles and lids on the top rack of your dishwasher.