You can find pee funnels at your local sports and outdoors shop. You can also order them online. If you’re in a pinch, you could make a cone with a sheet of paper to act as a makeshift funnel.

If you’re using an empty drink bottle, it’ll usually list how much volume the bottle holds on the label. It can be tougher to “aim” for smaller openings on bottles. Avoid using a glass bottle, which often have much smaller openings. Steer clear of cans as well, which have edges that could potentially cut you—which is something nobody wants happening.

If you’re driving a car, pull over so you can safely go to the restroom. Don’t try to go while you’re driving or it could lead to spills—or worse, a car accident. It might be helpful to climb into the backseat to give yourself more room to use the bottle.

If the bottle doesn’t have a lid or you don’t want to keep it stored, you can empty it out somewhere such as the side of the road. But don’t litter and leave the bottle behind!

If you have access to it, use soap and water to wash your hands.

You may want to keep the bottle stashed away out of sight as well. Just to be safe.

You don’t want to pollute the environment or force someone else to have to pick up your bottles.