Rude baby shower invitations?

My baby shower is coming up, and I really don’t want people to buy baby clothes because we’ve been given THREE TRASH BAGS full of clothes by a family member, and people have already bought a lot of baby clothes for us. There’s already way too much, he won’t even be able to wear all of it before he outgrows them. I didn’t put any clothes on my registries, but I have a feeling people are going to buy clothes anyway. Which I’m thankful for, but I want to avoid as much as possible since me and my husband have adopted an almost minimalist lifestyle, and are picky about the clothes we keep (we’re having a boy, so we don’t like the clothes that say weird things about the baby being a stud and a ladies man or sports clothes) Is there a nice way to let people I’m inviting know that we don’t need any more baby clothes and would rather have the things we need like diapers etc. is it rude to even say not to buy clothes?

Update: I think I’m going to just make a Facebook post close to my baby shower date and say something along these lines, let me know what you think

“We have received some amazing gifts for our baby already, thank you to everyone! Because we have been gifted 3 bags full of clothes and then some, we are afraid that if he gets any more clothes he will outgrow them and won’t be able to wear any new outfits! if you are planning on bringing a gift to the shower we ask that you bring a book instead of an outfit so that he has a chance to enjoy your gift.”

I will most likely reword it and any suggestions are appreciated, that’s just along the lines of what I might say. I really just don’t want to sound rude or even like anyone is required to bring a gift.