Multipurpose computer parts
A computer fan serves to cool down the motherboard and other hardware to keep the computer running as efficiently as possible. The filter serves to stop most dirt and debris from clogging the fan’s blades to improve airflow as much as possible. But if you remove the filter, you can use it as a sieve.
Whoever did this probably isn’t worried about drinking tea with all bits of dirt and lint, which we think is utterly disgusting. However, it only shows that you can use computer components for more than just, well, computers. And believe it or not, it was a technician who did this.