Returning shower gifts??

Looking for some opinions. We had our baby shower today and a couple of the people got together to purchase us a nice stroller (the kind that comes with a car seat attachment). And while I’m extremely grateful we already have one just in a different color. Is it acceptable to return it and use the money for other baby items? (I.e. diapers, formula etc) or is it rude to return it? Will I ever need to tell them or is there a chance they’d find out if I returned it? (These people would never come over)