OK, last friday I got to check this mascara out on a MAC press event. I reminded me of th Rimmel 1-2-3 looks mascara that just came out in Europe, it's the same concept. I have some pics for you...
When you twist the pink cap, you will pull the brush through a smaller hole, there will be less mascara on the brush. When you twist the purple cap, the hole will be larger and there will be more product on the brush, which will give you more impact on the lashes. The brush is not a big as the Opulash one, but had strange fibers, different then normal, a bit more bushy....or something like that! I don't think the mascara has glitters in it, but I'm not sure.
Looks like a fun thing, but not very unique in it's idea!