American baby products

I need help from all of you lovely American ladies here in the Glow community.

My husband and I are visiting his parents I California in two weeks. This is our son’s first trip to the US since we live in Denmark. My in-laws have asked, which baby products we’re gonna need while we are there and I have absolutely no idea 🤷‍♀️😅

So I’m asking you to please share your essential baby products and brands with me. Which are your favorites and which ones are your absolute must haves? We already have a bed, bath tub, stroller and car seat there, so it’s really more of the small things I’m looking for recommendations on 😊

Our son is turning 4 months while we’re there.

Thank you so much in advance 🙏