Stanley is best known for its durable qualitythe brand is a kind of counterstatement to disposable products. This shaker bottle made for training use is a great example! Its construction features double walls and vacuum insulation: when you prepare a drink, it stays refreshingly cool for hours. It also includes a handy compartment for drink powders and a removable strainer. The Activate Shaker is made from recycled 18/8 stainless steel. The odorless and tasteless material is easy to wash. - Main material: steel - Leak-proof cap made from extremely strong Tritan plastic - Stamped measurement scale on the inside - Rounded inner bottom: makes cleaning easier since powder residue wont get stuck in corners -Fast Flowdrinking spout allows liquid to flow freely - Bottom sized to fit cup holders - Wash by hand or in the dishwasher This product does not contain BPA.