The design concept is great, at least for short-term use. Hygiene would be a longer term issue. The real problems are mainly that the spacers must be stacked and so present pinch issues. Add to that that the spacers have irregular, sharp burrs. The posts come one size, long. I could drill them and cut them down for a proper fit and I could order longer spacers to do the same but that’s not really how I imagined this purchase should go. Disappointed is an understatement.