The S-LINER MULTIFILL is a flexible bucket packaging system that offers a sustainable solution for the multiple use of buckets and the prevention of bucket contamination. By inserting a removable and separately fillable inliner, the outer carrier bucket remains clean and can be used several times. The filling material only comes into contact with the S-LINER MULTIFILL, which can be professionally recycled after use. The carrier bucket can then be collected by the filler and reused or returned to SAIER Verpackungstechnik for recycling. Since the liner can be securely closed with a lid, the end user can use the liner to store leftover paint for further use.