How about a cocktail making kit?
You could create a custom cocktail making kit with all the essentials he needs to make his favorite drinks. This could include a cocktail shaker, strainer, jigger, bar spoon, and a mixing glass. You could also add some unique and high-quality ingredients that he can use to create some new cocktails, like artisanal bitters or flavored syrups.
Another option could be to sign him up for a cocktail making class or experience. There are many online and in-person classes he can take to learn more about the art of cocktail mixing, and he's sure to appreciate the chance to learn and improve his skills.
Or you can get him a star map with the date of your anniversary.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.