I recently purchased the Stanley Classic stainless steel vacuum bottle. The problem is , it wont keep anything hot . . Within two hours when I put in hot coffee , it is so cold it is undrinkable. Finally after the first month , I put boiling hot water into it. The outside of the thermos bottle was so hot you couldn't hold onto it. 45 minutes later , I dumped the water and put in very hot coffee, two hours later , it wasn't even luke warm. I've owned these thermos's for years and never had this problem . I brought it back to where I bought it today and told them I didn't have a receipt , but it was guarantied for life. . Walmart informed me they didn't have the warranty, Stanley did ............. it must be an insulation problem , with the outside of the bottle getting hot to the touch when I have hot water in it