Drinking Aqua's pee from konosuba would be the freshest, most purest way to drink water. as a goddess of water she has natural purification abilities and even been shown to accidently affects cups of tea that she serves. so I imaging the liquids being stored in her bladder can be "purified" and the fact it's always in in direct physical contact with her, her pee would be in a consistent state of purifying in her. i would use her body as my personal water cooler. drinking that pure, crystal clear water straight from the tap, ready to serve at my beckon call. i would make her drink non-stop so she will always be ready for produce fresh water for me to drink. i would drink from it every day, in the moring when she wakes up, at lunch while i enjoy my meal, in the evening when I'm feeling a little parch. i would just rip off her panties and go to town on ger clit until she climaxes her gallons of life giving, pure holy water. sometimes i might not even drink any water and just watch her squirm with her full bladder of the world's freshest water. if she pees herself it would be just fine since it's not even pee but just water at that point. she wouldn't go a whole hour without feeling the need to pee, and i as her master will only allow her to relieve herself in my mouth