I had not thought of the diuretic properties of tea (I'm one of those people who can have a 16 ounce cup of Starbucks before going to bed and not need to get up in the middle of the night to go to the restroom).

Now that you mention it, the occasion of the first accident included a whole lot of hot cocoa before bed. This last one was only a 6 ounce cup of mint tea (but he had a cup at each meal).