You can replant already blooming spring bulbs into a pot, instead of into the ground. Just follow the same procedure of gently tapping the contents of the purchased flowers out of the pot, trying to keep the soil and roots in tact. Then repot into your own container. Be sure the container has drainage holes.
These Double early tulips, Tulipa 'Largo' are underplanted with more spring bloomers, for an instant custom effect. Violas are perfect for this.