I received this teeth whitening powder and couldn't wait to try it. This is by Aprilis and is in a 1 oz container with a screw on lid. The charcoal powder is easy to use and doesn't taste terrible. To use this I wet my toothbrush and kind of shook the water off and lightly pressed it in the container. I brushed my teeth as normal, the powder felt a little bit gritty as I used it. After brushing my teeth with it I spit it out and rinsed with water, it looks really different I will definetly say that. After using I brushed with regular toothpaste because it left traces of black around the teeth and between some. After all done my teeth looked great and felt amazing, so smooth. I didn't notice a big differnce in color after using only a couple of times but over time I am looking forward to seeing a change. The biggest difference in the beginning is how smooth and clean they feel.