Medicament container of polymer of cyclic hydrocarbon for storing a liquid medicament

A medicament container for storing a liquid medicament comprising one or more medicaments, water and m-cresol and/or phenol and/or benzyl alcohol, the container comprising a distal and a proximal end portion and a wall, at least two opposite portions of the wall being of a polymer material, said polymer wall portions having a thickness of between 0.3 mm and 3 mm, a light transmission at 400 nm of 25% or more, measured through both of said opposite container wall portions when the container is filled with water, using a standard spectrophotometer and air as reference, the polymer wall portions being of a material comprising at least 70% by weight of a copolymer material composed of aliphatic cyclic or bicylic hydrocarbons with 5 to 7 membered ring or rings and ethylene or propylene, the material having a glass transition temperature above 50° C., measured by differential scanning calorimetry, by cutting pieces from the container walls and heating them in an aluminium pan from 10° C. to 270° C. at a scanning rate 10° C./min, the glass transition temperature being determined as the temperature at the inflection point;

• and a density of 0.95 g/cm3 or more.