I bought this years ago, and the carabiner was standard wider at the top than bottom.  I love the "rubber" bottle holder because it's a little more stiff than the other holders which swing freely when you're walking and the bottle's attached to your belt.  It broke my heart when I lost my original one (I put my bottle down somewhere and forgot to pick it up) and then prowled the stores looking specifically for this Bottle Bandit.  I could only find this on Amazon!!  I wish they didn't change the shape of the carabiner, though...