Teatro - for and beverage RIPOFF PRICES

My wife and I recently attended a show at The Teatro. We purchased two small tubs of "budget"(not even Cadbury quality) Mister Sweet Whispers type chocolate *****, one still water and one peach ice tea all for a RIPOFF PRICE of R173. Each tub of Whispers was R55 and although I do not know the individual price of the drinks, a calculated average price per drink of R31.50 - that is a 500ml drink. That is 3 times the price you would pay at normal retailers! Is Monte encouraging guests to bring their own in future - I certainly will (permitted or not) but I refuse to pay such ridiculous prices to Monte Teatro!