Tribal Beer Mats

An interesting one and a great exercise. However a very quick troll on Google tells me that Heinekin is, as I suspected, a registered trademark of the company and as such you could well be in technical breach by incorporating it in your own work and claiming it as your copyright.

... and I thought we'd seen the last of the buttocks!

Yes, Heineken would not be too pleased to see your artwork encapsulated by their corporate logo, you are taking enormous liberties on this one. Your designs have been interesting if not somewhat repetitive.