You can make orange juice without a juicer in several different ways.
One easy method is using a blender or food processor with peeled ripe oranges, a little water, and some sugar for sweetness.
Another great option is to microwave the oranges for 45-60 seconds, then manually press out the juice with your hands into a cup or bowl.
Lastly, if you have a garlic press or potato ricer, you can use those tools to extract the juice from halved peeled oranges for an even more pure juice experience.