The HEMPER Classic Tube BongDescription The HEMPER Classic Tube Bong adds elegance to a timeless classic design. This piece features a sleek, tried and true 21 inch body that allows the smoke to cool before getting inhaled. Combine that with the matrix end downstem and built in ice catcher and you're guaranteed a smooth rip every time. Scientific glass pipes include bongs, dab rigs and hand pipes with a clean and sleek appearance that resembles something you'd see in a lab.