Our wedding is not for another 5 months, but today we received a wedding gift (obviously not an engagement gift since we've been engaged for 10 months already, and not a shower gift since that's not until July and invites have not gone out). It is off our registry and was wrapped and mailed by Bed, Bath & Beyond. I'm assuming we can open it now mostly so we can go ahead and send a thank you note. But can we use it now, or does etiquette require we wait until after the wedding to use it?