BIG envelope in mail

I got this really big envelope in the mail. This is not the standard size. There is a lot of coupons inside this envelope. So this isn't necessarily business envelope it's more like a coupon book envelope. I notice that it's a very busy design with a lot of colors on the front. I wonder how much money it took to make this envelope. It got my attention. It's not mailed to a specific person either, it says "To Our Neighbors At..." 

The back of the envelope is complete different than the front. It almost looks like a different envelope. The colors aren’t the same in the back. It talks about how people can save up to 60% on their prescriptions, so it's still talking about saving people money. This envlope would have been better if the designs were similar front and back.