Knot It's patented technology is great for life's little messes. It's not a bag until you knotIT! The ability to make the bag any size necessary provides the flexibility and convenience that every parent will undoubtedly appreciate. The uses are endless - create a small bag for an apple core or a huge bag for wet bathing suits. Perfect for the diaper bag or the dog walk. Dispenser and one roll of bags. Refills sold separately.