Durable pieces typically have walls measuring between 3mm and 5mm thick.

Most local retailers market bongs as "tobacco accessories" or "water pipes" to comply with federal drug paraphernalia laws. In many shops, using illegal terminology (e.g., mentioning controlled substances) may result in staff refusing service.

Look for reinforced joints where the downstem connects to the main body, as these are common failure points.

Borosilicate glass is the industry standard because it can withstand rapid temperature changes without cracking. Avoid plastic or inferior materials that may release harmful chemicals when heated. Construction Quality: