The present invention relates to a container, preferably a cooling fluid expansion reservoir prepared from a thermoplastic composition comprising from 95-70 wt. % based on the weight of the thermoplastic composition of a polypropylene composition having a total amount of comonomer of at most 3 wt. % based on the weight of the polypropylene composition and comprising a random propylene copolymer having a comonomer content from 0.2 to 5 wt. % based on the weight of the random propylene copolymer and the random propylene copolymer having a melt flow index of at most 0.7 g/10 min determined in accordance with ISO 1133 (2.16 kg, 230° C.), from 5-30 wt. % based on the weight of the thermoplastic composition of reinforcing fibres, from 0-5 wt. % based on the weight of the thermoplastic composition of additives.