WANTED:FREE/(or Reasonable Priced) Thermos

Hello, I am looking for a thermos. Brand does not matter (Stanley/Thermos or any other brand) as long as it keeps the content hot/cols over at least 8+ hours. I am looking something with a bigger size ( 1+ liter if possible or multiple ones if the size is smaller.) and wider mouth. Please, let me know if you have any that you do not use and want to give away. Thanks.