Review on SENDESTAR Insulated Thermoflask Black 2 Silicone by Rodney Harris

I initially really liked this cap and straw for my 20oz Wide Neck Hydroflask. However, after just a few months, the mouthpiece smells moldy and disgusting no matter how I clean it. I only drink filtered water. I wash it at least once a week and even pop it in the dishwasher a few times to "sterilize". But no matter what, I can't get rid of this smell and it makes me angry. Very disappointed!