Upgraded Ultrasonic Retainer Cleaner Machine, 45kHz Ultrasonic Dentures Cleaner for Night Guards, Braces, Aligner, Toothbrush, Jewelry and More, 200ML Capacity, White

https://a.co/d/0i4OxFaP This is the one I got based on a recommendation in this sub from like a year ago and it's been great. Has slits on top that allows you to insert and clean your toothbrush too. I'm sure they're all relatively the same in the end.