Based on the assumption that you are asking about a 4-hour drifting or drifting-like experience, I will assume it’s in a river or waterway. In this case:
Typically, during a drifting process of around 4 hours, there would be designated stops along the way for users to take breaks, including visiting restrooms and refilling their drinks (if necessary). These break points might include scheduled ports where rafting guides or tour operators may have arranged facilities, such as picnic areas with amenities like portable toilets. If it’s a self-guided drift experience without professional supervision, you would still likely find brief pause opportunities at bends in the river or near confluences to get off your drifting vessel and address biological needs.
Please clarify if I should adapt my answer based on any specific conditions (e.g., location-specific constraints or other factors).