I don't know that particular unit, but I like to use hacksaw blades snapped off to fit my container. That's because they are dual use - I like having a blade that can cut metal. In a pinch, any reasonably hard and sharp steel will do. Often the back of a blade will work.

Not always, though. The shape does make a difference - eg most of the edges of my Prybaby are rounded and won't work, but the "V" section will.