Y Cut Nipples + thickened formula

Does anyone here use the Dr. Brown Y cut nipples? If so, can you send me a picture of the top of the nipple so I can see what the hole looks like? I have been looking online and can’t find it! I ordered the Tommy Tippee Y-cut nipples, but it’s like a large hole in the shape of a Y. I’m trying to find a nipple to suit my 10 week old. She gets thickened formula. So far I haven’t been able to find a bottle that works for her with the right speed nipple.