A. Specification: The top of the bottle mouth is round and smooth, which may facilitate the pouring of liquids. B. It is made of lead-free glass, being durable, rust-resistant, and heat-resistant. C. The bottle body has clear scales, which may make it easy to observe the volume of the liquid. D. There are various capacities available, which may meet your needs. E. Type: Conical flask F. Material: Lead-free glass G. Product specifications: 50 ml, 100 ml, 150 ml, 250 ml, 500 ml, 1000 ml H. Features: Easy to use, durable, thick-walled, and anti-volatile I. Bottle mouth diameter: Approximately 23 mm/0.91 inches, 24 mm/0.94 inches, 24 mm/0.94 inches, 26 mm/1.02 inches, 30 mm/1.18 inches, 33 mm/1.30 inches J. Bottom diameter: Approximately 52 mm/2.05 inches, 65 mm/2.56 inches, 69 mm/2.72 inches, 83 mm/3.27 inches, 108 mm/4.25 inches, 129 mm/5.08 inches K. Height: Approximately 100 mm/3.94 inches, 115 mm/4.53 inches, 122 mm/4.80 inches, 155 mm/6.10 inches, 183 mm/7.20 inches, 230 mm/9.06 inches L. Precautions: Due to differences in light and screen settings, the color of the item may vary slightly from the picture. Due to different manual measurement methods, slight differences in size are allowed. M. Package contents: 1 conical flask (other items are not included)