So I have six empty MAC containers ready to trade in for my free lippie...but I read an article in Allure this month that said something about MAC taking back six empty LIPSTICK tubes for a free lippie.

Is that the case, or can you also trade in lipglass tubes and e/s cases?

As long as you can recycle it, you can B2M it, Stacey :) ... whether it's a l/s tube, l/g tube, e/s pots, brush cleanser, it's all good!

I'm positive that they take 6 empty containers (lipstick, e/s, lipglass, etc.), they don't have to all be lipstick tubes. Unless they change the policy very recently, but I highly doubt that.

It's any empty that can be recycled... I've done eyeshadow, lipstick, lipgloss, and skincare!