For high-quality borosilicate glass (like Pyrex) or specialized plastic tubes, these retailers are reputable choices:

Test tubes are primarily available through scientific supply companies, educational retailers, and general online marketplaces. The best place to buy depends on whether you need professional-grade labware, school supplies, or bulk quantities for crafts. Professional and Educational Suppliers

: Offers a wide variety of both plastic and glass tubes, frequently sold in bulk for party favors, plant propagation, or simple experiments.

: A major supplier for researchers and healthcare professionals, offering a complete range of sterile and non-sterile tubes.

: Specializes in science kits and individual tubes for homeschoolers and hobbyists. They offer sets that include racks and cleaning brushes for about $18.95.

: A great source for buying individual tubes or bulk cases, including jumbo sizes and tubes with cork stoppers for home or lab use. General Retailers