This ginger tea is super strong, and will clear out your head if you're stuffed up.
Its store bought and from a packet but that doesn't make it any less effective. I have only seen it at Asian markets, so you'll have to go there or Amazon.
Its as simple as adding water. The packet contains powdered ginger crystals and sugar, so its a little sweet, and much stronger than the ginger teas that come in teabags. Be careful or you'll be up to a 3-a-day habit before the winter is over.