Review on EIGHT Huge 10mL SenAllis Cosmetics Teeth Whitening Gel Syringes - 35% Gel, Fast & Effective Whitening, Hi-Smile Compatible by Chris Edwards

I bought these as the amount of bleach was pretty good for the price. The problem is that the "syringe" has a large opening so you end up injecting a lot of product into your retainer or whatever you are using, usually in the wrong place. So while the price may be 50% of a 'regular' smaller syringe, it is actually more expensive because you can't measure what you need to use. The instruction manual for the charging cable width is a joke. No way you'll probably make it 3 times more. So, although cheaper if you use three times more, it really isn't that much. I'm going back to smaller amounts that I can actually measure.