Paddy goes to the local car boot and sees a guy selling thermos flasks

Whats that thermos flask thing he asks the seller,

Its a great invention mate, if you put hot things into this flask, they will stay hot all day
and if you put cold things in, they will stay cold all day too

OK I'll buy it says Paddy

next day at work, Murphy walkes over to paddy and asks what his new item is, Paddy tells Murphy all about how it keeps hot things hot and cold things cold ALL DAY

Thats very good says Murphy, what you got it it

I've got tomato soup and a choc ice