How can you make lemon juice rockets?

The construction of acid-base propellant rockets has been demonstrated on various kids' television shows (notably ZOOM on PBS-Kids). The concept involves preparing quantities of lemon juice (acid) and baking soda (base) and then combining them. The neutralization reaction produces copious amounts of carbon dioxide gas, which can dislodge and propel a cork (or in some cases a smaller bottle).

The construction is shown at the related link below.