You can definitely do so if you want. But if you get the water at Walmart and want to pay, you can crab the water to self-check out machine, tab ‘looking for iterm’ and type water, then you can just find water refil pirce for different quantity. For example, 5 gal for $2.30. Therefore, you don’t need to ask cashers or look for primo staffs …
https://www.reddit.com/r/walmart/comments/13kx66b/primoexchange/

