There's no secret meaning to the phrase, if that's what you want to know. If you buy a girl an iced coffee, and then you tell her she's pretty, that's a very nice thing to do, isn't it?

Peachey and Su.Ki have the right idea, but I would add that the underlying meaning is that she is a middle to upper middle class girl with tastes in accordance with that economic class (iced coffee - probably the type of girl who goes to Starbucks every day) who is open to being flirted with ("tell me I'm pretty"). It is a flirtatious, but not entirely serious, t-shirt.

Coffee and compliments - a cool, sweet frothy drink and some flattering attention. Yay! What more could a girl want?

It means to pay for him/her a cold coffee and to tell her/him that it looks like pretty.

The meaning is " Buy me (cold / coffee with ice) iced coffee and tell me ( say to me) I'm pretty (beautiful) আমাকে কিনতে বরফ কফি এবং আমাকে বলুন, আমি বেশ আছি" That's the translation to your language , I'm not sure that it's ok