There's a new regimen for colonoscopy prep, which appears to completely eliminate the need to drink any really foul-tasting liquids. It's called 'Sutab', and I think it comes from the company that makes 'SuPrep', which is the prep I used at my last colonoscopy 5 years ago.
This prep comes in the form of two containers containing 12 tablets each. You swallow 12 tablets along with a large quality of water, Gatorade, or any other clear liquid, the night before. Then, 5 hours before the procedure, you take another 12 tablets, along with the large quantity of liquid.
Assuming that this regimen does as good a job as the predecessor preps, this would make the whole procedure a lot easier. Since I'm due for my next colonoscopy shortly, I'll be asking the doctor about this.