I am trying to typeset a table indicating various kinds of
$\subset$ relations for objects in a grid. Is there a way to obtain a subset symbol that applies vertically, between objects where one is above the other? Detexify doesn't seem to have a symbol like this, although there are many vertical arrow-like objects in the Comprehensive LaTeX Symbol List.
This can be done by drawing a picture (e.g. with TiKZ or Xy-pic), or one could apply a rotation somehow to a standard "horizontal" symbol. I would be happy with a solution that only worked with PDF files.
Is there a "best practice" for rotating individual symbols?