Responses
I'm not entirely sure but I saw it as a kind of timer.
I'm pretty sure its a timer (so that he knows how long it takes JUST to go to the shops) (づ ̄ ³ ̄)づ
He was trying to measure the amount of time it took for the other guy to go to the store.
a timer ,right!

Guys what did he do with the water and that carton of milk(?)
I ddnt quite catch that huuuu ;0;