I lost another of the silicon zipper grabs on my Tecnifibre Tour 9-pack -- this is actually the second bag with the same problem (TF replaced the first one) -- and I am ready to move on. I might have given the VO2 Max 12-pack a try, but the beverage cooler on the Becker Special Edition is a nice touch and the bag looks good based on the photos. Any feedback on these bags? I am especially interested in whether the "rubber" zipper pulls are sturdy. Thanks.