This was in the OLD FASHIONED LIVING newsletter to day.  I remember these from when I was a child.  I think the one for the wedding is a truly great idea. 

We have poundings all the time and you are right, generally
people give a pound of food or paper products and the church
stewards collect it all together for whomever we are giving it to-
generally new pastors or someone in need in the church that
are having financial difficulties, etc. Of course, if a person felt
like giving more than 1 pound of something, that was alright,
but it was the minimum amount that people could give.
~Rush'd Lady

My son got married last month, and he and his new bride had
one of these showers. The way it was done for them is that
each person that came to the shower brought the stuff to make
a meal...like an Italian night, etc. My new daughter-in-law has
a few nieces and nephews that she baby sits for and their mother
fixed a large colander with the different boxes of mac 'n cheese. 
It was so cute. The bride and her stepsister love smore's, so the
stepsister brought the makings for smore's as her gift. All of the
stuff filled up their pantry, they only had to buy the meat and
produce that would go with each meal.  And to cover that they
received gift cards from grocery stores and Wal Mart. It was a
fun time for all. ~Sheliah

Before Thanksgiving every year our church will prepare pounding
slips.  A basket is prepared with slips of paper and on each paper
is a grocery item. Each family will draw one or several pounding
slips (depending upon their desire to help), the items are purchased
and brought to the church several weeks before Thanksgiving.  The
baskets are then prepared with the pounding items and distributed
to the elderly or needy in our congregation. ~Leah