Usually when I do a post like this, it's to gripe about some product not living up to its promises. In this case, I am prepared to offer praise.
The Ziploc bags with the Double Zipper Seal are a vast improvement over the ones with the single zipper. You can really get a sense that the fucker's closed. With the old ones, I'd always have to check to make sure, which wasted tons of my valuable time.
Don't get me started on the whole "yellow and blue make green" debacle. What a sham!