K.I.
I played soccer all my life and my kids have also played...the favorite has been either orange slices and Gatoraid or granola bars and Gatoraid.
Fruit roll-ups or fruit leather and water was also done a lot.
When we moved from California to Washington State and discovered that soccer in the fall is FREEZING we did a couple BIG thermoses of Hot Chocolate and got the coffee cups w/lids at Costco and granola bars. ~Just read you are in Florida, Ha-Ha! Disregard the Hot Chocolate idea :)
Truly whatever you find that is not super sugar filled and on sale will be fine! Just remember a snack AND a drink!