The debate about which is best between glass or metal pipes is a very old debate. Costumers over the years have stated reasons why one is better than the other. Some people prefer metal pipes because of their traditional looks, while others love glass pipes. They both have their pros and cons. Glass pipes can't be washed without running the risk of breaking it, while metal bowls may put off some toxins that are bad for human health. When it comes to functionality, they both operate incredibly. Choosing between glass and metal pipes really depends on your preference and what you're attracted to.