Stanley 0.47L Water Bottle, Green Purchased over 5 years ago. Used infrequently and stored for a long time. Used only for a short period in the winter two years ago (about 2-3 weeks, I think), as a replacement for a broken pot, to hold hot water. Therefore, there is no tea stain, etc. I haven't used it since then, and it's been stored away. This water bottle can be used daily or for outdoor activities. It would be great for picnics when it gets a little cooler.