Thermos Flask**

Ah Beng goes to a store and sees a shiny object.

Ah Beng : "What is that shiny object ?"
Salesgirl : "That is a thermos flask."
Ah Beng : "What does it do ?"
Salesgirl : "It keeps hot things hot and cold things cold"
Ah Beng : "I'll buy it"

The next day, Ah Beng goes to work with his thermos flask

Boss : "What is that shiny object ?"
Ah Beng : "It's a thermos flask."
Boss : "What does it do ?"
Ah Beng : "It keeps hot things hot and cold things cold"
Boss : "What do you have in it !?"
Ah Beng : "Two cups of coffee and one cup of ice cream"