What material is commonly used along with a tube for smoking crystal meth or crack cocaine?

The material commonly used along with a tube for smoking crystal meth or crack cocaine is glass. Glass pipes are favored in these scenarios due to their ability to withstand high temperatures without melting or degrading. The smooth surface of glass allows for a clean inhalation experience, as it does not impart any additional flavors or harmful residues that could come from other materials. The transparency of glass also enables users to see the substance being smoked, which can be a part of the ritual or experience for some individuals.

Wood, plastic, and metal are other types of materials that could theoretically be used for smoking, but they either do not provide the same level of safety at high temperatures or can introduce various impurities and elements that might not be ideal for inhalation. For instance, using metal could lead to the release of harmful gases when heated, while wood can burn and introduce harmful byproducts. Plastic can be dangerous as it may melt and can release toxic fumes. Thus, glass stands out as the most practical and widely used option for this purpose.