Whitening for life is good for one person only. It includes the aligner and teeth whitening gel at time of purchase. You can re-order a new applicator once every 3 months for life. This includes a maximum of 4 syringes per year for the term or 10 years. Each applicator is good for a maximum of 3 whitening treatments. Teeth should only be whitening a maximum of one time per month and should usually need re-whitening a maximum of 3 to 4 times per year.