Source Outdoor products are manufactured and shipped in Israel. I've used these "non" bite valves and their insulated tubing in my three Geigerrig hydration packs, the three valves I have. are green valves placed at an angle of 90 degrees. To operate the valve, remove the plastic valve cover from the rubber tip, unlock the tip by twisting it a quarter turn counter-clockwise, put it in your mouth, pull the tip of the valve out with your tongue and a inflated Geigerrig bladder, water comes out without having to bite the valve and suck, when you drink, close the tip with the tip of your tongue because you don't have to bite the valve to open it, this valve works great for prosthesis wearer like me. Source also has a cool product for filling the drinking chamber without taking it out of the box, this is a soft accordion fitting that attaches to the drinking tube, removes the no-bite valve and inserts the harmonica fitting into the end of the tube insert until it clicks, connect the open end to the faucet and fill your bladder, switch back to the bite-free valve and enjoy fresh water again, it's that simple. When you order from Source Outdoor Products, note that shipping takes longer because the products are shipped from Israel.
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