I purchased 5 of these and planned to give a few of them away as gifts. I opened one to try for myself and immediately noticed the cheap quality of the product, not what I was expecting. That aside, the bigger issue is the opening for the brush is too small and does not fit well with my Oral B electric toothbrush head. I can only barely squeeze it in at the smallest part of the brush, right near the head and bristles. This means the entire brush head does not sit properly infront of the UV lights. I also feel like the cheap plastic is going to crack l when I'm pushing the brush into my Bril. I am regretting my purchase and don't feel I would even give these away as gifts.