Klean Kanteen Cafe Cap Low-profile design Converts your wide mouth bottle into a splash proof to-go mug Only one moving part, easy to clean, and dishwasher safe NOT leak proof - use the wide loop screw on cap for transport No BPA, phthalates, lead or other toxins Works on all wide and insulated Klean Kanteen bottles Made from BPA-free polypropylene number 5 Safe for use with acidic or hot beverages, easy to clean and dishwasher safe