"He had purchased the liqueur with a fake I.D. that afternoon, and had carried it in the lining of his jacket all evening...He held the bottle to Lux's lips saying "Don't swallow"...Her throat gurgled with captive mirth. She laughed, a trickle of schnapps dripped down her chin where she caught it with one ringed hand, but the grew solemn..." pgs 129-130

I think that this passage has significance to it because it is making the reader realize what a tight leash the Lisbon girls are on. In the novel, Lux and Trip share peach schnapps. A peach is significant because it symbolizes longevity. It's ironic that they drank the peach schnapps since a peach represents the duration of life, and from the title, the reader can easily infer that they all commit suicide. This forshadows all of the Lisbon girls' deaths. The girls are all rebelling and going against their parents by drinking, and killing themselves slowly.