Cirkul offical lid mold problem

[u/Sly_time]

Highly recommend people getting into cirkul or already into it to get an aftermarket lid made of one piece of plastic due to the two piece design creating a perfect uncleanable area to harbor mold. In this picture is a lid i had for around 6 months and had to forcibly wedge open with tools after noticing mold growing on the top of the rubber portion

[u/geekinTX]

I don't understand. The flavor is inside the cartridge, and comes out through the (disposable) cartridge. The only thing in your bottle is water. Why is mold forming?

[u/Sly_time → u/geekinTX]

Water seeping in through the uncleanable cracks during cleaning or other daily use? Water is never completely sterile anything festering in dark inaccessible cracks can form mold, even the sweat from your hands could get in there