Alternative Media Cups

[Ippyroy]

I am looking for an item to use as a 7 inch media cup. I can't justify $20 for a plastic cup. I found these, and would love to use them, but there is no way I would put them in my tank. maybe someone knows how to remove the coloring making them safe. Has anyone found a cheap alternative?

 

[Reefer Reboot]

Maybe something along the lines of a pool skimmer basket.