Bullet Points : 1 > Ecrinal Bitter Nail Polish Is An Invisible Polish Containing Bitrex, A Very Bitter Ingredient That Stops Sufferers Biting Their Nails And Cuticles. It Is Totally Invisible And Safe 2 >Ecrinal Bitter Nail Polish Deters Children From Thumb Sucking As Well. May Be Used In Children Over 30 Months Of Age 3 >Totally Paraben Free, Toluene Free, Formaldehyde Free, And Acetone Free 4 >Can Be Applied As Often As Necessary To The Nail And Finger Tip Description : Ecrinal Bitter Polish For Nails, 0.34 Fluid Ounce