These are designed to sit on the floor of your shower, but when I use one I set it on a ledge that we have on the side of our shower (so the water hits it as it runs down the wall of the shower). Personally, I find this more effective because I'm tall and take short-ish showers. I also think it makes them last longer than with direct contact to running water.
"I Can Breathe Again" - A powerful mix of peppermint, eucalyptus & menthol works with the steam in your shower to help alleviate sinus congestion.
"Good Morning!" - A citrus blast to gently rouse you during your morning shower