What would make it perfect is a trap door or sliding bottom for easy emptying- An awesome DIY bottle opener, perfect for outdoor parties. It even collects the bottle caps. Ideal Father's Day gift or project to make with Dad.
Instead of a guest book, try a polaroid scrapbook. Make sure the polaroid camera has plenty of film. Wedding guest can strike a pose then leave their photo on the guest book, together with their short message for the couple. INSTEAD OF GUESTBOOK IDEA