An Idle Thought About Bedrock

Just wondering... What was the waste disposal situation in your average Bedrock household?

Imagine, Fred has just enjoyed a car-tilting helping of ribs at his local drive-in. Now, the "Moment of Reckoning" is at hand. Who has to deal with Mr. Flintstone's "Business"? My humble sketch offers one possible theory.

Feel free to leave your  suggestions for an even more hilarious alternative to the "Toiletasaurus-Rex'" caption I have supplied in the comments section. I can't come up with all the "funny" myself!