There were these two builders called Pat Mick who were working on a building site. One day, during their lunchbreak, Pat notices something in Mick's lunchbox

What's that long silver thing in your box Mick? Oh, that, it's my Thermos Flask replies Pat What's a Thermos Flask? enquires Mick It keeps hot things hot and it keeps cold things cold Pat informs Mick That's a marvelous idea! says Mick You know what, I'm gonna get me one of those The next day Pat spots Mick's shiny new Thermos flask and says to Mick I see you got one then Oh Yeah, says Mick What have you got in it then? asks Pat Well I've got Tea and a Chock Ice!