Tupperware 750ml Water Bottle Developed Mold

I purchased a 750ml Tupperware water bottle from your original Ümraniye store, and after just four months of use, mold has developed inside. A product of this quality should not experience such issues, especially when I haven't had any similar problems with my 500ml Tupperware bottle.

The current state of the product is unacceptable, and it poses a health risk, making it unusable. I am extremely disappointed and request an immediate replacement to address this defect. Please resolve this issue promptly to restore my trust in your products.