Yeah, the Coolest Cooler seems like a great product if you're into making blender cocktails at parties. A single unified battery for a Peltier and speaker and blender seems like a sensible idea, although it doesn't add
that much value over a separate battery-powered blender, Peltier cooler, and speaker. But realistically every place you're going to want a battery-powered blender you're also going to want a good cooler, so that kind of makes sense, and you can get a pretty good bluetooth speaker from a cereal box-top these days so that's a cheap bolt-on to make this the all-singing all-dancing party machine.
edit: Googling, I can't seem to find out - does it actually provide electric cooling? Or is it just a big high-quality insulated cooler with some electronic doodads attached?