Make sure that when you go to Bana Hills, you buy tickets online first, such as on Traveloka, take a one-day round-trip tour, it's not much cheaper than buying directly at the Bana Hills counter.
Traveloka Sdn Bhd (Registration No. 201501003122), Level 14 Tower 2, Menara Kembar Bank Rakyat, 33 Jalan Rakyat Brickfields, 50470 Kuala Lumpur, Malaysia