You can now add and categorize drinks in your recipe book. There's a little button the recipe page that lets you add, then you can categorize. To view your recipe book you can click the text at the top that says "My recipe book", click one of the many links around the site that say "Take me to my recipe book" or go into your profile and click "Recipe book" in the navigation there.

In the near future you will be able to print out your recipe book and the categories will be used as "Chapters" when printing.

The recipe book can also be used to keep track of favorite recipes and such.