Overview: It's Better With Bitters The World’s Best Kept Secret Aromatic bitters have been around for centuries, but what exactly goes into bitters, is one of the world’s best-kept secrets. First used as a medicinal aid to combat indigestion, bitters has evolved into an incredible enhancer for both food and drink. Good things come in small packages and the Thirsty Traveler intends to find out exactly what goes into this little bottle of flavour packed lightning.