Belt holder for a 16 oz. Grayl UltraPress Water Purifier Bottle. Added an 1/8" dia. elastic cord ("shock" cord or “bungee” cord) on top to secure the bottle while hiking. Sized for a 2" tall belt. I put a loop knot in the middle of the elastic cord to make it easier to grasp and pull up over the bottle cap. Simply size the cord and glue it in the lower holes with super glue (I use Gorilla Super Glue Gel). I printed it with PETG because it will handle the outside conditions better than PLA.