  We investigate dielectric branes in false vacua in Type IIB string theory.
The dielectric branes are supported against collapsing by lower energy vacua
inside spherical or tube-like branes. We claim that such branes can be seeds
for semi-classical (or quantum mechanical) decay of the false vacua, which
makes the life-time of the false vacua shorter. Also, we discuss a topology
change of a bubble corresponding to the fuzzy monopole triggered by dissolving
fundamental strings.
