Attendees at Rock the Park are expressing frustration at not being able to bring their own empty reusable water bottles inside the concert grounds despite thirst stations being available. Instead, they have to purchase a $5 water bottle, which can be refilled for free at the station throughout the night. If they bring reusable bottles, they need to check them with their bags, also for the price of $5, concert security told CBC News at the venue. "Most [concert venues] just let you dump your bottle if you got something in it, walk through and refill it, but unfortunately here they're charging for it," said Tori Jones, who was at the concert at Harris Park on Thursday.