It is hard to imagine Easter with out Easter lilies.
To keep the lilies from staining, take and just pinch off the end of the stamen where you see the yellow dust. The yellow dust is the pollen and that is what leaves stains.
If you received your lilies in a pot of soil then after Easter take your lilies out side to plant. They will die back in the winter. But they will reappear mid to late spring the following year. They will bloom for you in the middle to late summer. Plant them in a sunny location for best results.
Easter lilies are highly toxic to cats and likely other household pets.