2 types of containers work well for use , one is a small black nylon mesh
drawstring bag available at most dive shops or those huge "everything
sports" type stores . the other is the Kraft parmesan cheese container , the
top has a flap that locks close very tight . hope this helps , and for
collecting spots in CA. try Kim Hutsell, as collecting there is basically
illegal he can tell you the options about proper collecting , Peggy Williams
has some affordable trips to Baja that would help you fing a ton of great W.
coast stuff , good luck , PS, don't put poisonous conus in a mesh bag, Mark
& Peta  Bethke
Hollywood, Florida