Product overview Brown glass lab bottles Temperature-tolerant borosilicate glass With pouring ring and screw cap Heat-resistant up to 140 ℃ Available in various sizes Lab Bottles, Square These square lab bottles are made from brown borosilicate glass 3.3 and are suitable for mixing and storing solutions, as well as chemical and pharmaceutical products. The glass lab bottles have a practical scale for clear estimation of the filled amount, a blue pouring ring and a blue screw cap. Product Details Lab bottles, square Made from brown borosilicate glass 3.3 Glass lab bottles with scale With blue pouring ring and blue screw cap Threads: GL 80 Temperature and chemical tolerant Heat tolerant up to 140 ℃ Available in various sizes Delivery contents: 1 bottle Lab bottles made from borosilicate glass are particularly tolerant to water, chemicals and pharmaceutical products. Furthermore, borosilicate glass lab bottles are insensitive to sudden temperature changes and are therefore, excellent for various uses in the clinical lab or general practice.