So the driver gets it at the fountain, and puts it in the truck, suffices the provision, is that what you are saying?
Here is my take on your example for the fountain to suffice in this way based upon my understanding and interpretation of OSHA requirements. Assuming the building water is safe, doesn't taste or smell bad and the water fountain is functioning as designed.
1. The fountain needs to be so situated that it can safely fill the required container without the potential for contamination from the water fountain spigot.
2. UPS needs to pay for and provide the driver with a covered container with single-use drinking cups stored in a sanitary receptacle for this purpose.
3. Portable sanitary containers used to dispense drinking water shall be capable of being tightly closed, and equipped with a tap. Water shall not be dipped from containers.
Any container used to distribute drinking water shall be clearly marked as to the nature of its contents and not used for any other purpose.
Common drinking cups is prohibited.
Where single service cups (to be used but once) are supplied, both a sanitary container for the unused cups and a receptacle for disposing of the used cups shall be provided.
4. The sanitary portable container for the driver must be sufficient to hold suitable drinking water in amounts that are adequate to meet the health and personal needs of each employee for the duration of the drivers work day.
5. Based upon Health and Safety professional recommendations it is reasonable for the container to be a 3 gallon container filled with water and enough ice to ensure that there is an adequate supply of suitably cool water for the duration of the driver's shift.
If this requirements are met then I think it is a good start to enable the fountains to be the means of fulfilling the OSHA requirement for to provide water for the drivers.
UPS does not provide socks, shoes, or water jugs. I would much more rather them provide the shoes, than a water jug,
Socks, shoes not OSHA regulated. Water jugs are.