For this, you will need a carwashing sponge (useful because they're resistant to disintegrating, are sometimes made to withstand high heat, and are readily available), a pair of scissors, and six elastic bands.
Step 1: Unwrap your sponge
Step 2: Cut sponge into 6 pieces
Step 3: Tie an elastic band around each piece
go across, twist, and across the other way
Step 4: Enjoy wrinkle-free laundry