Momentum Accessories Copper Water Bottle, 20-Ounce, Rose Gold / Red Gold Best Quality + Refund Guarantee, "The Better Copper Bottle" offers better overall substance and quality than the competition. Honestly, you will love everything about these beautiful bottles. There are several vendors of similar bottles, these are 99% pure copper with extra deep lid threads to make it leak free. The 99% pure copper keeps water "bacteriostatic", that is, it kills bacteria inside your water bottles. Natural copper looks great shiny or tarnished! It is very, very easy to clean with a little lemon and salt, or polish from the grocery store. Stylish and distinctive, notch up your style with our lovely alternative to clunky, plastic bottles. Copper accessories like these truly pull every look together. We love our copper bottles, La mejor botella de cobre es mejor! ...and a little cat humor can make your day better!