* Conversion Factor: 1 ounce is equal to 29.5735 milliliters.

* Calculation: Multiply the number of ounces by the conversion factor: 5.291 ounces * 29.5735 milliliters/ounce = 156.48 milliliters (rounded to two decimal places)

Therefore, 5.291 ounces is approximately equal to 156.48 milliliters.