Maxpedition 32-Ounce Military Water Bottle 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 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.