Straws made from a special ionomeric resin were described in 1992 for special applications that required higher standards of mechanical integrity and biocontainment than the traditional paillettes. These “high security straws” are manufactured and distributed exclusively by the medical subsidiary of IMV called Cryo Bio System (Paris, France) for use in human assisted reproduction and other areas of application. These CBS^TM High Security Straws are often referred to simply as “CBSTM straws”, but must not be confused with other straws made from PETG that the company also sells.