Pokémon HeartGold Version Tips

Sometimes when buying a drink from a vending machine in either the pokeathalon dome, or on the 6th floor of the Goldenrod Dept. Store, you will get the drink, and then a message saying "Bonus" will show up, and say that you got a second drink for free! How lucky <img src="http://i.neoseeker.com/d/icons/bigsmile.gif" border=0 vspace=2 alt="" />