Pack of 50 Baby Soda Bottle test tubes, made of high quality transparent polyethylene terephthalate (PET). Threaded tube includes a screw cap which provides a water-tight seal (note: cap color may vary). These durable plastic tubes won't break and can withstand heat of up to 260°C, so are dishwasher-safe. Great for laboratory experiments, general mixing, and for use as observation chambers. They also work great for storage and organization. Tube measures 1" in diameter and is 5" tall; body inner diameter measures 0.6". Capacity: 25mL.Eisco Labs proudly manufactures its own products using state-of-the-art equipment, and following the highest standards of quality control. Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. They are manufactured with only the highest grade, raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments.