Sometimes walking through the store can surprise even me. I hadn't noticed this until someone pointed it out to me. This is a cool marketing idea. What we have here is a thermos made up to be a shotgun shell. Cool idea. This would be a perfect gift for fathers day. Unfortunately we're almost sold out, so if you're interested get your butt in soon. The thermos says that it keeps liquids hot or cold. How does it know what to do?