Extraction tests have been carried out in order to verify whether BPA is not present in the above
specified non-epoxy closures. As a result BPA was not detectable with the detection limit of
5 μg/kg cured coating in all cases [2]. Due to the fact that there is no official detection limit or a
threshold of non-intended contamination stipulated anywhere for BPA, we do not guarantee that
there is no trace amount of this substance, as impurity or otherwise, present in Silgan White Cap
Press-On Twist-Off® and Twist-Off® metal closures [1].