The straight mouth conical bottle is made of 3.3 high borosilicate glass, with a standard capacity of 500mL, uniform wall thickness, and a temperature resistance of 200 ℃. The straight mouth design facilitates the installation of rubber plugs, funnels, or sensors, while the conical bottle body reduces liquid splashing; Matte scale ± 5%, with a flat bottom that can be magnetically stirred. Standard anti scald silicone sheath with drop cushioning. Students can use it for experiments such as solution preparation, dissolved oxygen cultivation, yeast fermentation, etc. Suitable for middle school chemistry laboratory classes, helping students master basic experimental operation norms, understand chemical reaction phenomena, and cultivate observation and hands-on abilities.