Double Duty

Double Everything

Double, double toil and trouble

Double Play

Double the Pleasure, Double the Fun - Double Mint Gum

Double Take

Double Trouble

Everything is in triplicate.

FEED, BURP, CHANGE, repeat if necessary / repeat frequently

I'm in charge here ... NO! I AM !

I'm seeing double

A sea of babies makes an ocean of diapers

Takes Two To Tango (and that's what you were doing inside me for nine months!)

Tea for Two

A triple

Triple Play

Triple Treat

Two/Three for the Price of One

Two/Three of a Kind

Two peas in a pod + a bonus

An unassisted triple