Last week I mixed some apple juice with my hot chocolate after lunch. I didn't make it any better, rather, it was kind of bad. So today I tried a more extreme combination in hopes of a better result: hot chocolate and Mountain Dew. Can't say it was good, but I enjoy the confusion that my mouth experiences. It tastes mostly chocolatey at the beginning of a swallow but mostly dewey by the end. I recommend it, just for the experience.
Another good mouth confuser is ketchup on ice cream.