Lightweight (5.4oz empty weight) | Patent pending 1/4 turn on/off lid mechanism | Wide mouth threadless design makes for easy cleaning and is ice cube friendly | BPA free materials | 100% deep drawn recycled aluminum construction | Flexible food grade coatings insure no chips or flakes end up in your water | Recyclable | In collaboration with Liberty Bottleworks | Made in the U.S.A | HOW DO I WASH MY LIBERTY BOTTLE? Answer: we recommend hand washing your bottle. Little soap, a little water, some elbow grease and call it good