Advanced anti leak technology, scientifically designed strainer eliminating powder lumps BPA free, 100 percent leak proof and highly durable | Recommended for mixing protein drinks at gyms or for energy drinks for outdoor sports | Our specially designed vacuum seal prevents leakage. Leak-proof lid serves easy shaking and mixing. | This shaker bottle is easy to clean with warm water. A warm, damp cloth is all it takes to keep it spotless and looking like new. | The strainer is made with extremely durable plastic that helps to eliminate powder lumps from the protein shake or juices.