how to pass a Unique Pointer

I have a class Container, having a data member.

std::vector< std::unique_ptr<Sum_Function> > Functions;

This is how i add value to the vector.

MaxSize is the child of Sum_Function.

void WavefrontRenderer::AddMaxSize()
 {
     Container cont;
     std::unique_ptr<Sum_Function> ptrMaxSize = std::make_unique<SumMaxSize>();
     cont.AddFunction(ptrMaxSize);
}

this is the defination for Function in the Container class.

void Container::AddFunction(std::unique_ptr<Sum_Function> &func)
 {
   std::unique_ptr< Sum_Function > function(std::move(func));
   this->Functions.push_back(function);
 }

Is this the correct way to add Unique pointer to a vector.