A high-quality glass rose pipe should have a smooth, fire-polished rim to prevent injury. The 'rose' or decorative element inside should be securely fused to the glass wall to prevent rattling or breakage during transit. For B2B buyers, verify the airway consistency; a uniform internal diameter ensures a steady draw. Additionally, look for annealed glass products, as the annealing process removes internal stresses created during manufacturing, significantly reducing the risk of spontaneous shattering.