Bottled water, and the people who clutch a bottle wherever they go.
Believe me, the exertions involved in creating a Powerpoint presentation rarely require constant rehydration. I know your dynamic, outgoing persona demands that you look ready and prepared to undertake a marathon at any moment, but really, the closest you'll get is another Snickers bar.
The bottled water may, however, be useful given an eternity in Room 101.