Continuity mistake: When the father says the boy needs a stitch he puts his hand around the boy's face, but a shot later it disappears.
Continuity mistake: When the breakfast scene is about to end, Miranda stabs her fork on the food. A shot later she has vanished from the spot.
Continuity mistake: When Miranda tells the girls that she met someone at the gym she grabs a mug. A shot later it's on the table.
Continuity mistake: During the walk at night, after they cross the street and talk about "thinking delusional", a bunch of people appear out of nowhere between shots. (00:07:28)
Answer: A popular brand of sexual lubricant. See http://www.k-y.com/index.jsp.
J I Cohen