This 100% leak proof 500ml / 17oz BPA free reusable refillable insulated stainless steel bottle shaped flask, painted in a special Friends of The Earth design fits all cup holders, bike bottle holders and external mesh pockets on rucksacks. The ridged cap opens with just one twist, and the wide mouth provides a smooth, rapid flow. Thermoshield double walled vacuum insulated 18/8 stainless steel keeps your drink at the perfect temperature, hot or cold. Keeps drinks hot for up to 12 hours, or keeps water chilly cold for up to 24 hours. These drinks bottles stay sweat and condensation free. No concerns about rings on your table or dampness in your bag! Hand wash only.