Portaledge straps by Granite Design
With people wanting to carry less on their backs and more on their bikes, the clever souls at Granite Design have come up with yet another method of carrying 'stuff' on the bike. This time using water bottles bosses, and if you already use these mounts for a bottle cage & bottle, don't dispair, the Portaledge SE mounts under your bottle so you can have your cake, no, water and drink it!
The lightweight alloy plate has a 30mm silicone-coated hook and loop strap to keep your kit safe and secure. Neat