Package for a pharmaceutical product and method of sterilizing the package

A package for a pharmaceutical product, particularly a liquid ophthalmic composition, such as an ophthalmic solution, gel or ointment, for example a tube or a dropper bottle assembly used to dispense said product, wherein said package is made of a specific form of polypropylene and wherein said package shows after an autoclaving processing of at least 121° C. and for at least 20 minutes no deformation such as shrinkage or blowing-up and retains a sufficient high squeezability in order to dispense said product. Also claimed is a method for sterilizing a pharmaceutical package comprising the steps: placing closed package into an autoclaving chamber, adjusting the temperature and the pressure in said chamber as a function of time in accordance to the prerequisites of the material of said package, wherein a counter pressure is generated in said chamber and wherein this is regulated electronically via computer, and wherein said counter pressure avoids a deformation such as a blowing-up of said package.