How many times have you passed on a glass of wine because the kind you wanted was only sold by the bottle? The Japanese have a good thing going called "bottle keep" that takes care of that problem by allowing customers to drink what they want out of a bottle of wine and save the rest for later. The restaurant puts the customers name on the bottle and keeps it in the back until their next visit.
What an awesome way to make the most of a bottle of wine (not to mention impressing friends and family with the VIP treatment!). Obviously this idea isn't reserved only for the Japanese so now I'm be on the hunt for a restaurant that offers this service (or something like it) in my area.