Here are some pictures of toilets that do a particularly good job of working with bad karma:

That's one damn nice toilet. I have the shivers already, imagining what it would be like to be on that toilet. Blissful!

Here's a smaller toilet, good for vegetarians, since only a minimal amount of bad karma gets produced by them.

This is the kind of portapotty you would find at camp. It is so efficient at whoosing away bad karma, nearby bears sometimes get flushed in it! The dimensions there are actually wrong, the unit isn't mm, it's cm, so all of your friends can have have a karmathon, with you, on the same toilet!