The mug (minus alcohol) will be available at the Mark Twain Room from 7:00am to 6:00pm on Friday, August 23rd…while supplies last.
On Saturday, August 24th, you’ll be able to get the mug filled with a Piranha Pool cocktail at Trader Sam’s Enchanted Tiki Bar. The cocktail includes strawberry vodka, pineapple juice, cream of coconut, strawberry pure, and blue curacao.
The empty mug is $30 plus tax, while the mug with cocktail is $45 plus tax. There is a limit of two per guests and no discounts apply.
Source: Disney Parks Blog