Question: how much psi can a 1 liter bottle hold?
Answer: At room temperature, the pressure in a bottle of soda is somewhere between 276 and 379 kilopascals, or 40 to 55 pounds per square inch. Heat makes gasses expand, increasing the pressure, so a bottle of pop in a hot car can get as high as 689 kilopascals, or 100 pounds per square inch.