What is the pressure at room temperature in an unopened 2 liter soda bottle?

The pressure in an unopened 2-liter soda bottle at room temperature is typically around 2 to 3 atmospheres (approximately 30 to 45 psi). This increased pressure is due to the carbonation process, where carbon dioxide is dissolved in the liquid under high pressure. When the bottle is opened, the pressure is released, causing the gas to escape and create bubbles.