What is an amount I should give as a bridal shower gift?

I am invited to a bridal shower next weekend, and my 16 year old daughter is invited as well, so it’s the two of us attending. The bride is marrying the son of my best friend. The location will be a fancy restaurant.

What is a good amount to give as a gift?

I’d really rather give a “gift” gift instead of money because I can get something nice for a reasonable price if I shop around, but the bride and groom already live together and probably have most things they need. On their online gift list, they have very few items, and mostly are looking for cash to fund their honeymoon.

I’m thinking between 50 and 100 is good but I really have no clue. Advice?