Sure it does. Why do you think we started this business? It has to do with science and fluid dynamics, much like the Coors Light Double Vented Wide Mouth can. But we're too busy doing field research on both and haven't come to any solid conclusions quite yet.
Cost to build?
This ones a little more difficult, but you can DIY it for under $50-$80 for one tab. For tools, you'll need a jig saw and miter saw, but for materials Amazon and Home Depot have everything you'd need. Time wise, you can expect it to take a few hours to build.
How much to buy?
Well, you can get ours for $195 + shipping. The high end models sell for $495ish and it is pretty professional looking, it does the same thing as ours though. Frankly, you could deck screw 2x4's and a cutting board to your hull and it would work just as well, too...
$19.99 DIY Guide
For the mechanically inclined... We've put together a list of tools and materials you need, where you can buy them (affiliate links of course) as well as measurements in a step by step guide to build your own at home.