Bottles are the ideal 'health conscious' accessory for anyone - fill them with cold water and they keep it cool (up to 24hrs), fill with coffee and they keep it hot to warm (up to 12hrs), fill with Jack Daniel's and you will convince anyone you're just a regular healthy person - no one will know! Made from 18/8 Stainless Steel (medical grade steel basically) Vacuum insulated - keeps stuff hot or cold 500ml capacity 26.5cm high and 7cm wide I'm afraid you have to wash in the sink - not dishwasher safe, sorry guys! Cool must have or present.