Filter Duration: One carbon filter lasts 40 gallons - approximately 2 months Included: One carbon filter, a filter casing that attaches to the filter and one non-filtered straw Leakproof: Simple Flip Straw Lid offers a tight seal to prevent spills and leaks; This product comes with a fitted straw that locks into the lid and was designed to be used with or without the carbon filter. It also comes with a clear straw used in other Simple Modern products. Not recommended for hot or carbonated beverages Double Wall Insulation: Keeps beverages at ideal temperatures for hours Limited Lifetime Warranty & Pat/Pat Pend