Crumbs. now this thread has me wondering if I'd be offended if anyone bought me an urn. And I'm not sure. Let's see... I'd rather be buried than cremated, but that's a preference I'm happy to forgo for the sake of cheapness (on the grounds that, well, I'll be dead). Plus, I've recently been thinking I ought to donate myself to medical science... something that doesn't really appeal, but see above re. dead! Also, I think most urns are tacky... but then, I haven't made a particular study of them. (I'll bet you can buy work-of-art rns on Etsy!) Plus, again... dead!
So in conclusion, I'd probably find it rather odd, but I'd only be offended if it was my mother-in-law who purchased the urn.
If it were one of my sisters we'd probably get into a very complex argument about the design of it, and then I'd go "Eh" and forget it. Just like we have long, involved discussions about the music we want at our funerals, and then go "Eh" and forget it.
Side question, and I hope this isn't too macabre, but how big does an urn have to be? I don't believe I've ever been to a funeral where ashes were scattered or anything. Are there, like, cups of ashes, or only a little? Inquiring minds want to know...