This Protein Powder Shake Cup is made of PP material, BPA-Free, and heavy-duty build; No plastic smell; Width-mouth, easy to clean and refill,The spiral spring in high quality stainless steel can mix protein powders and exercise supplements ensuring a smooth shake.The design of the flip cap is leakproof and spillproof, for this, you need to give the cap a hard push to open.It can also keep your supplements in a removable storage capsule directly below the cup. Especially for workout, you can use it for mixing protein powders, making shakes, smoothies, and other nutritious drinks to quick nutrition supplement.Custom logo is welcome!