A container such as a bag, a bottle, a vial, a large volume parenteral, a small volume parenteral, a prefilled syringe or a cassette for an IV (intravenous) aqueous solution of a Gram-positive oxazolidinone agent such as linezolid or eperezolid which comprises having the container-solution contact surface material is made of at least 50% polyolefin such as polyethylene, polypropylene, polybutenes, polyisoprenes and polypentenes and copolymers or mixtures thereof.