Beckman Coulter one-liter bottles, made of either polycarbonate (hard and clear) or of polypropylene (translucent), are designed for many uses. A plastic sleeve must be used around each bottle during centrifugation in Beckman Coulter J6 rotors to prevent the bottles from stretching or breaking. In other rotors, if the bottles fit snugly in the buckets, sleeves are not required.
Choosing the right tube or bottle for your protocol can be challenging. Considering your requirements and these factors will make your selection easier.