For Tobacco Use Only A water pipe is a pipe designed to remove the impurities from tobacco smoke by filtering the smoke through water. Highest Quality Glass Made on American Soil. 16 Tomahawk Caliber – Twin Turbine Percolators – Splash Guard – Borosilicate Glass – Air-Craft Grade Aluminum Base – Custom Carrying Case – 7mm Thick Glass – U. Caliber Quality Glass & Welds -16 Tall -Includes 18mm Borosilicate Glass Bowl. Made in USA Introducing the 16 Tomahawk from US Caliber Designs, A USA Glass company. This American Pipe is the highest quality 7mm-thick borosilicate glass featuring Twin Turbine Percolators, Splash Guard, and an Air-Craft Aluminum Base. The Tomahawk includes a hard shell carrying case and a 18mm bowl. Experience the enjoyment of an American Made glass pipe from US Caliber Designs.