The AlcoMate replacement mouthpieces are essential for maintaining hygiene and preventing cross-contamination during multi-person breath alcohol testing. These mouthpieces feature a specialized one-way valve design that ensures the user’s breath flows into the sensor without allowing any back-flow, which protects both the subject and the internal integrity of the device. Using genuine Abbott-approved mouthpieces is critical for maintaining the accuracy and DOT-compliance of your breathalyzer unit during workplace or clinical screenings.