Jashin eats poop, hahahahahahahahaha
On a more mature note, that should've been an obvious lie even to a dumb snake. For one, they wouldn't be giving Yurine the chance to eat poop because they like her. If they did put poop in the chocolate, they'd have said it aloud so she'd know beforehand. Second, liquid poop is not something anyone should ever have on their mind, but if they did and they produce enough to put it into a souvenir that's produced in high quantity, even a demon would need to see a doctor for that. Finally, I now have the disgusting image of the mole-faced sister having projectile excretions while the older sister catches it in a jug, and I can't get that hilarious yet sick image out of my head.
@Amphguy It is pretty common in Japan though. It is to make you warm when you sit down on the toilet on a cold morning. I personally wouldn't use it because of sanitary problem. Japan has some pretty weird things. Visit a Daiso and you will see.