Here's one, Rob.
One of the issues when sailing offshore is making sure crew members stay hydrated. Important for two reasons, alertness and good judgement suffer when a person becomes de-hydrated, and de-hydration leads to constipation, and no one likes to unclog the head!
A skipper that I sailed with a few years ago issued each crew member a one liter plastic screw-top bottle with a flip-up spout in the lid. Each crew member was required to drink one bottle in the am and another in the pm, at a minimum. We put our initials on the bottles with indelible ink to so he could check up on us. With the closeable spout, the bottles could be put anywhere in the cockpit and not spill.
I've adopted the practice on my own boat.