You need a cup,cheesecloth,knife for this step.
Step 1: Grind Some Charcoal
Step 2: Dump Charcoal in Filter Cup
Step 3: Add Sand
Step 4: Put Cheesecloth Over It
Step 5: Add Some Charcoal Again
Step 6: Then Sand
Step 7: Finally Put Cheesecloth at Top of Cup, Filter Is Done Enjoy:)
A link to our website that explains it all.