Lid for Water Tank - Waterpik WP-305

I bought the Waterpik Travel Flosser WP-305 / WP 270 at an outlet store without a box and I just assumed the tank lid was missing. Turns out they never made one. But I didn't want to use an open tank of water to floss my teeth - I don't plan to use for travel. So I created this lid. It just rests on top the water tank as you can see in the pictures. Super niche, I know, but I figure if even one other person can use it, it's worth posting!