"And soup tends to be warm, but since we're missing the warmth of the sun...."

César lets out a short laugh as he realizes he forgot to get a basket or anything but picked up a candle they didn't end up needing instead. So he goes to get potatoes, quietly using his knowledge of engineering and physics to stack the potatoes in his arms so that they interlock just enough that he can carry them without dropping them.

In other words, he's a big nerd.