Supplementary Figure 4: Application of aluminum foil on 120 mL bottles.

When using 120 mL equilibration bottles, apply a 5x5 cm piece of thick acetone-cleaned laboratory aluminum foil in order not to expose the sample to the plastic cap. Place the foil on the mouth of the bottle, with the dull side facing the inside of the bottle. Carefully crimp the foil around the neck, making sure that the foil touches the bottle mouth completely, showing no creases.