iWantWhiteTeeth Thermoform Dental Trays and Retainer Case are ideal for those who already have whitening gel syringes. The mouth trays custom mold to your teeth for a precise fit. EACH KIT INCLUDES: 2X THERMOFORM TEETH WHITENING TRAYS: these mouth trays custom mold to your teeth for a more precise fit, resulting in a better whitening experience (comes with one upper and one lower tray) RETAINER CASE: this hygienic retainer case easily and safely stores your custom trays and prevents bacteria and germs coming into contact with them between uses iWWT Instructional Insert. We make people smile for a living--with little-to-no sensitivity. It is our mission to provide the highest quality service and products to our customers. Smile with confidence, look fresher and younger. Perfect for red wine, tea and coffee drinkers and smokers. Safe for veneers, caps and crowns. Same enamel-safe whitening agent that dentists use. Effectively brighten your smile and remove stains from your teeth.