Amazon.com reviews of the MyPurMist Handheld Steam Inhaler are largely positive, with customers praising its beneficial effect on allergies, sinus problems and chronic congestion. It produces steam quickly and has no mineral build-up, and the localized area of steam production prevents the growth of mold.
Amazon.com customers rated the inhaler with 4.1 out of 5 stars, with 307 5-star reviews out of a total of 488 as of March 2015. However, dissatisfied customers state that the inhaler broke quickly after three to four weeks and that customer service was not helpful replacing the unit or refunding the money.
The MyPurMist Handheld Steam Inhaler is described on Amazon.com as being safe for kids, using only water to produce steam. It does not create boiling water, making it safer for use. Safety features automatically shut the inhaler off after 20 to 25 minutes. It is advertised as a natural germ-free decongestant and comes doctor-recommended.
Steam is a natural decongestant, helping moisten and loosen hard mucus secretions in the lungs, according to Best Health Mag. Adding a few drops of eucalyptus or pine oil to the water helps soften the mucus and bring it out of the lungs, helping clear the bronchial tubes. However, one review of the inhaler on Amazon.com states that using anything other than distilled water voids the warranty.