Revealing mistake: When the baby is about to be baptised, it is replaced by a blatant doll: The doll's arm is stretched out (as opposed to the real baby's arms, tucked in his robe), and the doll's hair is very obviously painted.
Continuity mistake: The way Steve's mom's plastic bag is tied around her head changes between shots. Check the knot.
Continuity mistake: When Steve arrives with his mom, he is either standing on the left of the cab's door or on the right.
Continuity mistake: When Miranda greets Steve's mom, she holds the umbrella straight upwards, but from the opposite angle it's bent backwards covering Miranda's back.
Answer: A popular brand of sexual lubricant. See http://www.k-y.com/index.jsp.
J I Cohen