OYEET S2 (BLUE) Vortex Shaker Bottle The newly designed vortex system provides a more efficient way to mix your protein and nutrition shakes in just seconds. The 316 surgical-grade stainless steel whisk ensures safe and durable use for years to come. Purest Taste Guaranteed Made from medical-grade Tritan (Eastman) plastic, the shake bottle is stain and odor-resistant, BPA and phthalate-free. All silicone parts are also food-grade and FDA approved, ensuring safety and purity. One Hand Open & Lock Simply touch to open the lid for convenience. Push the locker up to secure the spout. The leakproof and dustproof drinking spout ensures safety during outdoor sports. Silicone Protection The sports bottle is thickened for durability and features a 3mm thick silicone sleeve for a secure grip. A portable handle on the lid allows for easy carrying even when your hands are full. Perfect Size to Go Fits in most cup holders. The shaker is ideal for individual supplement use with its 18oz capacity. With silicone protection, it's durable enough for camping, biking, or any outdoor activities.