Reply To: Mayim Achronim for Guests

For those who are interested, this is the Psak I received:

This is certainly true for the order of kiddush and washing, though you can of course tell your guests in advance that they should feel comfortable to wash in between if they wish to do so.

For mayim acharonim, those guests who are particular to wash mayim acharonim should do so even in your home, but this does not mean you have to invest in a special mayim acharonim cup: It is fine to allow the guests to go to the kitchen (many do so anyway), or to use a regular cup for purposes of mayim acharonim.”