Glass ampoules are airtight containers filled with the highest quality of key ingredients, producing a very concentrated treatment form. They have a white ring on the neck, which is the breaking point. Dr. Temt offers light gel & oil ampoules. Gel ampoules are easier to absorb by the skin; they can be used with Galvanic Iontophoresis (- to+), ultrasound, high frequency. Check the handbook of your devices. They also can be used to perform the face massage with or without a steamer. All gel ampoules can be used together with a suitable mask, which increases the effects. Oil ampoules can only be used for massage.