Related על מעשרות 1:8

[If] one was pressing [dried figs] into a jar, or a circle [of dried figs] into a container (מְעַגֵּל בַּמְּגוּרָה, see Maasr. 1:8) and [in the process] the jar broke or the container opened, it is forbidden to casually eat them [without tithing]. Rabbi Yosei permits it because "the bottom layer needs the upper layer" (i.e., until the entire jar or container is filled, the "work" of pressing figs is not completed, see Minchat Bikkurim here).