D.I.Y)10 Thermo-molding "BOIL and BITE" Mouth Trays by Instant White Smile Wholesale

These worked great for me. I followed the instructions posted by other reviewers. Boil water and then pour it into a cup. Hold the mouthpiece by the tab and dip it into the hot water. Hold it in the water no longer than 6 to 8 seconds. The second you see it start to slightly droop, pull it out, let the water drip off for a second and then put it in your mouth biting down with your teeth and sucking in your cheeks. This will mold it to your teeth. But it's important to understand that these are not like custom trays you would get from a dentist (and pay hundreds of dollars for). They are not going to perfectly mold to your teeth. That's not really their purpose. Their purpose is just to hold the whitening gel against your teeth. These are very thick and bulky and on the hard side. They're not the most comfortable things in the world but again, they're not really supposed to be. They are really only there to hold the gel against your teeth. Following these instructions, my trays came out perfectly every time.

These molds refuse to conform to teeth despite me using them at the rather painful high temperature of 200F (which is way higher than most molds, which normally work at ~80-85C). Even the 'successful' molds, which you can see in other reviews here, are terrible quality and don't conform at all. It isn't a technique issue, I bought a different brand and had zero issues at far lower temperatures.And the seller has set this item to no returns accepted, which means that to get refunds for defective items you have to go through a very non-standard process with Amazon to refund them.

They work perfectly, if you do it right. These trays are made from a very soft, pliable material. When dipped in water that is at a rolling or near rolling boil the tray will almost immediately shrivel, rendering it useless. I followed the instructions of several previous reviewers who essentially said: Fill a glass quart measuring cup with water and put it in the microwave for about two or three minutes, depending on the strength of your microwave - *remember - hot, not boiling water.* Dip one tray into the hot water for about six seconds (don't over do it) then put it in your mouth and kind of vacuum seal it around your teeth by sucking the air from between the tray and your teeth. If the tray does not get quite as tight as you like, dip it in the hot water again, for a couple more seconds, and repeat. This works for the upper and lower trays. Honestly, my first attempt at fitting the trays was not great - not terrible either - but not great so I had to give it a second try. The second set was perfect. When I helped my husband with his set, it was perfect the first time. I was very happy to have five pairs of trays - an extra for practice. I have been using these with, Watts Power Deep Stain 36% Whitening Gel, followed by, VitaBrites Remineralization Gel and am absolutely thrilled with the results - for myself and my husband. For nice, white, healthy looking teeth, the price is outstanding!

Gave it 4 stars because it did not fit as well as we hoped after boiling but that may or may not be our fault. It's a great value for how many you get so I would definitely recommend this to others. If you mess it up the 1st time you still have extra to try again.

I read the instructions step by step but still the mold doesn't fit right and when I put the liquid brightener inside is too wide for it to when is the front and the back of your teeth but the liquor whitener does whiten your teeth

These worked great for me, and I got a good set of trays the first try. I initially bought the Shine Whitening with Zero Peroxide that came with a set of trays. I had never tried whitening my teeth before, and the directions that came with the kit were not very good. This set looked pretty deformed. Once the plastic got stuck together, there was no getting it apart.I ordered this set to give it another shot, and got a good set of trays on the first try. I filled a glass measuring cup with water, and put it into the microwave for about 1 1/2 minutes until it was boiling. Then I held the first tray into the boiling water for 6-8 seconds until it was just starting to soften. I let the excess water run off of it and put into my mouth on the bottom teeth being careful that it went over the teeth. Then I sucked in my cheeks with my mouth closed. This pulled the tray up to my teeth. Then I used my fingers to make sure that the tray was formed to my teeth, took it out of my mouth, and rinsed it with cold water.I did the same thing with the second tray without re-boiling the water, and put it on my upper teeth following the same procedure. Again, I had a perfect tray. I think the problems happen when the trays are left too long in the hot water. This will make them too soft and limp. If you try to shake off the excess water, the soft plastic will stick together and you will never get it apart - especially if you got it too soft.In summary, to get perfect trays the first time, do one at a time, don't leave them in the hot water too long, don't shake off excess water (let it run off), and suck in your cheeks to pull the forms close to your teeth.

If your teeth were perfectly straight these might be ok- although thick. These will not form to teeth properly no matter how many times I put them in hot water and tried to make them conform.

I'm currently using teeth straightening aligners and can no longer use the $500 bleaching trays from my dentist. I was looking for a low-cost alternative while my teeth are still shifting into place. these trays fit the bill. I was a little concerned after reading some of the negative reviews, but the tips the other reviewers left were spot on. I didn't boil my water, I just put a coffee mug with water in the microwave for two minutes and then held the first tray in the water until it began to droop and curl (around the count of 15) I placed the first tray in my mouth and sucked in my cheeks, the tray molded to my teeth perfectly. once the trays cooled, I put my bleaching gel in as usual and I could feel the gel start to bubble and work right away. I'm very happy with this purchase.

Works great, had to leave it in the water for about 12 seconds as 5 seconds did nothing to the plastic but after I noticed it start to become pliable I took it out of the water and followed the rest of the instructions and they formed to my teeth perfectly!!

Rubbish!

Probably the worst purchase I ever made. Ok maybe user error the first pair or the second or the third but common …..they are very are hard to handle and guaranteed not to work well. Don’t waste your money

Took me two tries to get it right but it does work. good thing it comes in a 10 pack

I wish they were smaller and thinner. quite a bit of plastic in my mouth. Also used half of them to get a decent fit