$list is not an array, each time you add to it you are actually concatenating to it. You can start with a single item array, using the unary comma operator (this is just one way to do it), now each addition will add a new array item:
PS> $List = ,"MyProduct 11 MyProduct"
PS> $List += "YourProduct 11 YourProduct"
PS> $List += "SomethingElse"
PS> $list
MyProduct 11 MyProduct
YourProduct 11 YourProduct
SomethingElse
PS> $List -like $var
MyProduct 11 MyProduct