In 2025, The Double Strainer reinforced a clear mission: publish service-ready cocktail knowledge and bar systems designed for real venue execution, and make them completely free for the global bar community.

Most bartenders today meet Kevin Kos on a screen before they ever meet him at a bar. You’re between shifts, scrolling, and a calm Slovenian voice starts explaining how to get more juice from one lemon, or how to batch an Old Fashioned so it pours perfectly every time.

I started The Double Strainer because too much know-how lives in back offices and paywalled PDFs. This project exists to keep the craft open, practical, and free — from milk washing to menu engineering — so you can bring clarity to prep, service, and training. Today’s post is both celebration and instruction: a precise recap of the year, the people who inspired us, and the practical guides, worksheets, and recipes you can put to work tonight.