Freshly cut large leaves make natural waterproof anchors for summer drinks. Lush foliage, such as the hosta leaves we used, add color to table settings and act as reminders of tropical vacations. Cut leaves early in the day, and set them in water immediately, keeping them hydrated in a container until it's time to serve drinks. Dry before using.
Leaf Coasters
Freshly cut large leaves make natural waterproof anchors for summer drinks.
Martha Stewart Living, June 2008

fun idea I lived by the forest should of thought of this for one of our parties...
what a nice idea!