These liners are 100% Australian made using recyclable and biodegradable materials. These bag liners make removing used coffee grinds as easy as putting out the garbage. Heavy duty bags lift straight out of the tube and are easily disposed of without mess. Roll of 100. Weight of bag liners and CKTL together is 7.5kg. Comments: Sometimes when a bag becomes quite full a vacuum may form underneath making it hard to remove the bag from the tube. Solutions: 1. Drill a couple of holes in base of tube. This prevents the vacuum from occuring. 2. When emptying, tie top of bag up in a knot and lay tube on ground. The waste settles to one side reducing vacuum effect and makes it easy to slide bag out. This method is also easier on the back.