Decreasing the volume of a plastic bottle increases its pressure

Boyle,s laws say that when the volume of gas decreased at a constant temperature then the pressure of gas increases and when volume of gas increases, the pressure of gas decreases. Therefore volume and pressure are indirectly proportional to each other.

So the correct answer is yes, decreasing the volume of a plastic bottle increases its pressure because when volume is decreased the volume for gas molecules inside the bottle also decrease and these gas molecules will exert more pressure to the walls of plastic bottle.