The LaTeX command for supseteq (⊇) is \supseteq.
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Write \supseteq inside math mode, that is between $…$ for inline math or in a \[ … \] or equation block for display math. It is part of core LaTeX math, so no extra package is required.
As a relation, \supseteq gets a thick space on each side, and a long inline formula may break after it. With unicode-math under XeLaTeX or LuaLaTeX, typing ⊇ in a formula gives the same symbol.
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\parallel\nparallel\prec\succ\preceq\succeq\subseteq\subset\supset\subsetneq\sqsubseteq\sqsupseteq\in\notinRelation symbols in LaTeX: the full table or search all 350+ LaTeX symbols.
Use \supseteq in math mode; it needs no extra package. For example, $a \supseteq b$.
None: \supseteq is built into LaTeX, so no extra package is required.