Yeah, I would have allowed Sop here as well as 'ep.
KGT says Sop means consume solid food, tlhutlh means consume liquid, and 'ep means consume chatlh. It also says that chatlh "contains less liquid than the typical Terran soup." It seems pretty strongly stated that Sop is inappropriate for chatlh.
Ah, but this soup was cold. Clearly it had gotten chunky.
It's like a McDonald's hamburger. They put something in it to eerily make it never seem to change over time. That stuff'll chatlh rur forever.
jIHvaD Arnold Rimmer mu'mey Qav qawmoH mu'tlheghvam. «*ghaSpa'cho chatlh» jatlh.
HovHom Doq vItIv.
jIHvaD tlhIchDaq ghotI' yIchoq, nIQ vISopmeH jIchegh.