Oggi sport bottles are an eco-friendly and health-conscious way to keep your hot drinks hot and your cold drinks cold for hours. They're made with two layers of BPA-free, easy-to-clean stainless steel. A layer of air between the steel means the bottles will never sweat. These Oggi bottles come in more than a dozen colors from three series: sophisticated Calypso Matte, bright and cheerful Calypso Neon, and metallic Calypso Lustre. No matter which color you choose, you have the choice between a 17-ounce and 25-ounce bottle.