I saw a grey-scale style calendar (branded with a pharmaceutical brand) in a pharmacy the other day. I asked if it was an e-ink display and they said yes. Then

I saw a grey-scale style calendar (branded with a pharmaceutical brand) in a pharmacy the other day. I asked if it was an e-ink display and they said yes. Then they realised it was just an old-style flip-page calendar which LOOKED like e-ink.