The disposable liners thread directly into the lid using our improved V3 threading system for a more secure, consistent fit. We've refined the threading mechanism to ensure perfect alignment every time - no more cross-threading or loose fits. This enhancement makes cleanup even simpler: just remove, dispose, and replace. The improved design ensures a tight seal with every liner change, without requiring any extra force or special alignment. No washing required, and no worrying about proper threading - it just works.