in leu of the napa wedding this is a cute favor idea! and it is something that people can actually use- would work well for an engagement party favor but i dont think you need favors for the engagement party!
$3.85-$5.99 Simply Elegant Chrome Heart Bottle Stopper - It's simply the perfect design for the day you give your heart away! Along with the graceful chrome heart that sits atop the bottle stopper, the lovely wedding-white gift presentation that distinguishes Kate Aspen's Simply Elegant favor collection speaks for itself. http://www.amazon.com/dp/B005BJ7ZN0/?tag=pin2wine-20