Don't throw those shells away, put them to a good use, e.g. look below.
C5Alive's Memorial 'Ne uanescet' (To be seen in the near future at Hyde Park).
Idea based on the Texas 'Cadillac Ranch'.
Or
Would also be a fine addition as a flower bed in the garden.
Cheers (to all that can't be with us today).
KarlG.