It is now theoretically possible to have an nfc multi sig with your toothbrush.

#[0]​

https://www-igen-fr.translate.goog/accessoires/2023/05/hacker-la-puce-dune-tete-de-brosse-dune-brosse-dents-intelligente-137455?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp