this review title is: this was a great purchase i already have the trays and the content is: this was a great purchase i already have the trays so i just needed the bleach the peroxide does not hurt but the high concentration means i can use it for a shorter period of time this comes with a tube and a syringe so you just put some in the syringe for application and it can be stored separately.there are other information for this review, one is this reviewer did purchase it and the other is 5 people think this review is helpful.