DIY tape dispenser. Great to have in your craft closet! Instead of a hacksaw blade, what about the blade from the Saran Wrap or Aluminum Foil?
Also on these boards
DIY Washi Tape Pencils - So cute, so easy!
Tape Dispenser Makeover (via Smashed Peas and Carrots) via Wired 7 Scholastic DIY Projects to Customize Your Study Space