[civilitty]

Copper has anti-microbial properties and acts as a spermicide in a pinch.

[dustypotato]

Wait, what use do you see for it as a spermicide? How would you use it?

[civilitty]

Figuring it out is half the fun! ;-)

(For some hints, see the sketches of the Dwarven Kama Sutra found in JRR Token’s estate)

[Maxion]

https://en.wikipedia.org/wiki/Copper_IUD

[dustypotato]

Doesn't seem like a water bottle though :|

[irrational]

You don’t use copper condoms?