There is are continuity errors in The Incredibles, many involving Elastigirl's bag.
When her jet explodes, there is no bag. When she turns into a boat, she suddenly gets her bag back. When she and her family wash ashore, the bag is gone again. When they find the cave, they suddenly have the bag again.
Also, where did Violet get her headband from at the end of the movie?
10/10, perfect film.