Although it’s not a rule per se, it’s an old royal family tradition — and we all know how the royals are about their cherished traditions. Princess Diana actually broke this rule in the ’80s while raising William and Harry. “I’d be pretty sure the baby will have disposable diapers rather than the cloth ones,” she famously said. “I think it will be ordinary nappies, the ones that most people’s babies use. That’s a sign of the changing times. I think the royal family will, like any family, adapt with the times.”
However, Kate admitted back in 2013 that she was using cloth diapers, and considering they’re good for the environment, it won’t be surprising if Meghan goes that route as well.