A device for subjecting to laser treatment articles, in particular articles chosen between sanitary products and components of said products, comprises a laser-beam source configured for applying to the articles a laser spot with a diameter of between 50 \u03bcm and 2000 \u03bcm. The strain gauge is capable of measuring large displacement of around 30% true strain. Further, the length of the base may adjust to accommodate a varying number of the containers. In use, the slide automatically retracts as the nozzle is inserted into the nozzle opening and automatically extends into locking engagement with the mouth when the nozzle becomes fully seated. This sauna equipment thus provides uniform temperature and humidity even in a large bathroom.