I intermittent cath and found that if I drink a cup of coffee every day for a couple of weeks I have incontinent issues. I get so I can hold about 150cc in my bladder before I begin to leak. It takes about 10 days of staying off caffeine and increasing my oxybutynin for the issue to clear up. Thought I had a bladder infection but found to much caffeine is not good for me. Not sure if anyone else has had an issue with caffeine that cath themselves.