Abstract: The present invention relates to a capsule for a substantially cylindrical vessel with a shell surface, an upper open end, and a lower closed end, wherein the shell surface, at least in the area of the open end, is of substantially cylindrical design. In order to protect substantially cylindrical vessels against breakage in cost-effective manner, it is suggested in the scope of the invention that the shell surface above the closed end comprises at least one means for forming a free space, which is a crimp, directed at least partially inwards on the shell surface. Here, the capsule is configured in such a way, that it can be fitted onto the bottom-side end of the substantially cylindrical vessel. The tolerance limits of the substantially cylindrical vessel are thereby compensated.