If a hermetically sealed bottle with a small amount of water is cooled, then the vapor pressure is inside the bottle.

When cooling the bottle, the following processes will take place:

– the temperature of water and steam inside the bottle will decrease;

– the internal energy of the steam will decrease, the condensation process will begin and part of the steam will turn into water;

– since the steam temperature will decrease, then according to the law p1 / t1 = p2 / t2, the steam pressure will also decrease.

Therefore, the correct answer: the vapor pressure inside the bottle will decrease.