We make orange juice about two to three times per month. We are not big on fruit juice but I do keep it around as it's the only way Bella (nickname for my 8 year old) will take her liquid iron. She absolutely loves creating in the kitchen and especially loves juicing, so this is one of her favorite things to make.
After the oranges are juiced I removed the pulp and pith from the peels. Then added them to a half gallon mason jar with whole cloves and cinnamon sticks. Covered the peels with distilled white vinegar. Then let this sit for six weeks, shaking the jar daily. (It helps to count out six weeks from the day you make it and label the jar with the bottle by date).
Another favorite use for citrus and half gallon mason jars - Vitamin Water. My personal favorite is lemon, cucumber and mint. You can make vitamin water flavored with any fruits, herbs and veggies you prefer, the choices are limited only to your creativity!