You could also make these out of left over house-wrap material from Tyvek by asking for scraps from a contractor that is building a home near you.

FORBES: Snip Burn Solder Shred

This applies if you paid off a lien placed against your property by material suppliers because of debts owed by a builder or contractor, and you made the payment so as to avoid foreclosure and loss of your property.

FORBES: Overlooked Tax Deductions