Dental Braces/retainers

My daughter lost her retainers outside Mahon Point main entrance on 24th December. They look like retainers but with a screw like apparatus in the middle. They are 2 retainers, one for the top & a smaller one for the lower teeth. If anyone may have picked them up or even saw them can you please contact me. She has to wear them 24/7 but being a teenager didn't want to wear them that day. She put them in the front pocket of her bag and somehow lost them. Any info at all would be greatly appreciated. Thank you. We are distraught over this,