The present invention relates to the technical field of refillable PET bottles. It is an object of the present invention to provide a refillable bottle which can be used for mineral water and is a veritable refillable bottle, i.e. which can be filled with mineral water independent of what beverage it contained before. This is achieved by means of an additive in the container wall which binds the acetaldehyde contained in the PET and by using a bottle forming process which allows the production of containers (from a preform) which can be washed at a higher temperature without noticeably shrinking.
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