One of the features with this is that it's waterproof.
From Amazon
Sleek MakeUP Sleek MakeUP Kohl Liner, High Impact Easily Blendable Eyeliner, Up To No Good 1.2g
Parfumdreams
Sleek Eye make-up Eyeliner Kohl Liner Up To No Good
This product is also available at 2 unverified merchants.