A 'warp drive' with more reasonable total energy requirements

I show how a minor modification of the Alcubierre geometry can dramatically improve the total energy requirements for a 'warp bubble' that can be used to transport macroscopic objects. A spacetime is presented for which the t otal negative mass needed is of the order of a few solar masses, accompanie d by a comparable amount of positive energy. This puts the warp drive in th e mass scale of large traversable wormholes. The new geometry satisfies the quantum inequality concerning WEC violations and has the same advantages a s the original Alcubierre spacetime.