When you donate a suggested amount toward any item at the snack shack, you are helping to fund various ministries at/through Rest in Grace Church. This is included, but not limited to - general supplies, kids ministry, homeless ministry and etc.
Every so often, what remains is donated to the homeless or those in need. This way you don't go hungry and neither do they. Food is an important duty. Meeting spiritual needs without meeting physical needs is only getting half of the job done.
"Suppose a brother or a sister is without clothes and daily food. 16 If one of you says to them, “Go in peace; keep warm and well fed,” but does nothing about their physical needs, what good is it?" - James 2:15-16 (NIV)
"Then the twelve summoned the multitude of the disciples and said, “It is not desirable that we should leave the word of God and serve tables. Therefore, brethren, seek out from among you seven men of good reputation, full of the Holy Spirit and wisdom, whom we may appoint over this business; but we will give ourselves continually to prayer and to the ministry of the word.” - Acts 6:2-4 (NKJV)