How about a fermentation starter kit? You can put together a few items such as a fermentation crock, a set of fermentation weights, a few fermentation recipe books, and some sampling jars. This will give your friend everything they need to start fermenting at home and could be a fun bonding activity for the couple to try together. You could also consider including some unique fermentation ingredients, like kimchi paste, sourdough starter, miso paste, or a kombucha scoby. Not only will this gift enable them to explore their passion but will also give them an opportunity to try new recipes and experiment with creative ingredients.
Or you can get her/him a star map with the date of the wedding.
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.