You know them, you love them, the one and only Grav, one of the most popular brands of American scientific glass out there. We see you, boro bros. Grav glass makes all of its pieces from high-quality borosilicate glass that is significantly more durable than most average glass pieces. For years their best sellers have been their trademark Sherlock pipes and classic spoon pipes that make for simple yet stylish smoke. Their water pipes come in all kinds of crazy varieties from traditional beakers and tubes to glass milk cartons and slurpee cups. If high-quality glass and made in the USA is important to you, Grav may just be your new favorite.