This 12 ounce 18/8, food-grade stainless steel bottle from Klean Kanteen has a 2.125" wide opening diamerter, which will fit standard backcountry water filters and other accessories designed for wide-mouth bottles. The bottle weighs 2.75 ounces and is 4.5" tall without the cap. It is 2.75" wide. The interior of the cap is also 18/8 stainless steel.
