Small but practical wedding favor ideas?

Hello! My fiancé and I are nerds and we're getting married in June 2020. We ordered custom-printed dice (with "Jeff and Lisa 2020" on the 6th side) and we plan to have rock candy in our wedding colors (blue and purple). I plan to put a dice and rock candy stick in little sheer fabric baggies tied with a ribbon. I just feel like it needs one more little thing, something else to fill out the bag or add to it. I'd like to spend less than $300, but I also want the gifts to be useful and practical (don't we all? haha). What kinds of fun practical wedding favors have you all used and loved? Any nerdy favor ideas? Thank you!