I have had the Contigo water bottle for about 6 months. It has been wonderful up until the last couple months. It has been leaking from the seal area and the water shoots out of the straw if it is closed too long. The water bottle has not been dropped or damaged in any way. It has been hand washed and never in the dish washer. When I bought the water bottle it was advertised that the bottle would not leak. I really like the water bottle, but it's starting to make me think about buying a different brand of water bottle.