Tuned Pale Ale is a product by designer Matt Braun. There's a musical scale down the side of each bottle. You can drink down to a particular level, blow on rim, and the bottle will play a note. If you get a few people together with these bottles, you'll be able to perform a melody. Braun writes:
This product aims to promote more of this type of social interaction. This product aims to inform users about the musical qualities of existing bottles and to make the bottle a better instrument.
Link via Gizmodo | Photo: Tuned Pale Ale
-Andrew
Or it's a brilliant way to sell seven 6-packs.