In this case, you can create new container mapping and then cut (CTRL + x) the existing mappings that are outside the new container mapping and paste (CTRL + V) them onto the new container mapping.

Fill the area with white, right click on the sidebar and copy the layer style. Paste this layer style onto the container to quickly add the same border effects.

Consider: the water and viscous paste in the same volume of container from the funnel-type leak. Obviously the water to leak faster than the paste.