Assumption (partly from personal experience) that products may be more likely tainted with unknown or harmful substances for the sake of cost cutting somewhere in the pipeline.
I feel your pain, recalling the last time I moved out. Buying anything on Amazon is a disaster.
Friendly tip. Go to a local supermarket or department store and get what you need there. The item will for sure come from a normal manufacturer/brand and satisfy the local regulations against toxic plastic and stuff, even if it was made and imported from china.