Ftm question!

💚 Erica 💚 • 💖 Kaylee’s Mom 💖🥰💙 Due Nov 24th with baby Noah 💙

I have a brand new car seat, thanks to my father in law! But I'm just curious if I could use an expired car seat as a carrier, JUST USE FOR CARRIER. As I said, I have a brand new car seat. It's exactly like the one pictured.

So I'm just curious if I could use an expired or used car seat, like the one below for example, for just carrying the baby around in and putting it a shopping cart while I shop.

Thanks!