JetPack
Jet Packs are items that can be obtained in Doodle Jump. You will fly up quickly and for a little while longer than a Helicopter. Jet Packs give you 3000 points. In the Ocean version it seems that the Jet Packs fly more than the other Jet Packs, but the number of surplus of points is the same.
Variations
In the other modes, there are many different looks to the jet packs to fit the theme.
Ninja
They look like scrolls.
Underwater
They look like oxygen tanks.
Easter
They look like carrots.