What sandwiches you are talking about?
In CH3, calling Kaori in the morning leads to a generic event with a variable that's tracked. Rather than explain everything twice, I'm just gonna copy paste the event.
pbj hasn't been referenced anywhere else yet. We can only hope there's no nefarious use for it.
Getting to the end of the game but it bricks your save just before the finale if you took the shampoo from the fridge.
Actually, the shampoo was dealt with in 0.45, or at least an opportunity to deal with it was given. During the second reset puzzle after sensei quest, you find a mysterious door that Maya 2 is hiding behind. If you have the shampoo, she steals it away from you, and then you have to talk to the door again to get the Maya 2 profile outfit.
If I remember correctly, you're not required to open the door or have the Maya 2 outfit. That would technically mean there's a way to still have the shampoo after an official way to get rid of it was given. If he was trying to be as much of a dick as possible, he'd want people to keep the shampoo.
The only thing stopping this from being true to me is you'd miss out on Maya 2, which is antithetical to green path. But I could think of infuriating ways around it like giving out Maya 2 again.
I might need to look up what events I can fail due to low lust between the CH4 start and part 2 of Halloween.