Quartz Conical flask ,quartz Erlenmeyer flask 1.Good Air tightness 2.Platinum Spun Gold Quartz Erlenmeyer flaskQuartz Conical flaskQuartz Molotor Cocktail1.Quartz Molotor Cocktail with Platinum Spun Gold.2.The sizes are 250ml ,500ml,1000ml,2000ml3.Good Air tightness,Platinum Spun Gold. Quartz Conical flask ,quartz Erlenmeyer flask