You need to have both sexes. Only the females will have berries, but they need a male for pollination. They will grow in a large pot.
Silver Queen is a male and will not have berries.
Golden King is female and will have berries.
This one is supposed to be self fertile Ilex aquifolium 'J.C.van Tol'
These are both Self fertile holly trees
i have a few old cds hanging in the branches . and plenty of feed out fot the birds