Too big for the Grip-n-Gulp? Too small for the OTF? Try this on for size. We take the 12 ounce bottle and pair it with the leak proof On the Fly Cap. We also made the silicone stopper a little softer so it would be easier for the little peeps to push closed. For our adventuring prodigies, there’s the Kids OTF. It features everything that’s made its grown-up version wildly popular (one-handed opening, leak-proof design, durability, odor resistance), but its 12-ounce size is more manageable for little hands and thirsts. It’s carabineer friendly, too, so hook it to their backpack or your daypack, and get out there. Cap is made in China, bottle is made in USA.