cryo tubes and vials

cryo tubes and vials have some common characteristics. They are made from non-cytotoxic and non-mutagenic plastic resins and are pyrogen-free. They are sold individually or in bulk packaging and in uncapped or non-sterile varieties for less demanding uses. Most cryo tubes and vials have screw-style closures that ensure the caps stay on in spite of temperature and air pressure changes. cryo tubes or vials are available with either internal or external threads. Because the caps fit over the outsides of the tubes, external threads help maintain the sterility of samples. Some cryo tubes have round bottoms and others are skirted so they can stand alone. Vials may be sized for specific applications, such as those that need to fit inside long tubes or canes during storage.