The card draws you in based on the fun design, and while there is no type on the outer cover, I'm not sure it matters because it establishes branding and creates interest to see what is inside. The wine bottle cutout is clever, so as the business card is pulled out it makes the bottle seem empty.
Environmental Consultant Business Cards environmental-design. I like this idea, but one pitfall that I see is if you're handing a person a business card on a piece of cardboard or a napkin for example, they might not want to put it in their wallet (or if its on cardboard it might be too big!). This would be idea on scrap paper