17.3oz and 12.8oz are available, Made of high-quality stainless steel, durable. Silicone cup body not only make the mug looks elegant, but also offers a secure and comfortable way to hold. BPA free screw lid, along with the silicone seal ring avoid water leakage. It can keep your drinks secure and has a splash-proof flip-lid for convenient drinking, just need open the sip hole.