Can anyone help me ID this cactus? About 6 years ago I got my little sister this tiny keychain-cactus, so that it can keep her company at university. (I never expected it to survive even a year) She has taken exceptionally good care of it and it's grown a lot and got its second pot upgrade recently. I would love to know what kind it is, so that I can maybe get her a bigger/grown one or even just to look at pictures of older one to see what they look like when they are not grown from a keychain... (Unfortunately I don't have better pictures) Thanks!! Originally by u/inescapably on Reddit: https://tinyurl.com/2bdddhtf