Ah siao, dunno if by March it'll be the same but tell your parents to pack a few ziploc bags hor. Coz no carry on of liquid items on flights. Especially for US-bound flights. Either pack in check-in luggage or if u hand carry, have to pack in ziploc bags for easy inspection. Singapore still not tat bad coz they provide the bags for u. At Narita airport, they make u buy! Not ex lah but still troublesome. Irritating.
Btw, I saw a RX7 on the Tokyo streets leh. I thot it was a Miata from the front, but the back looks different. Heehee... Luckily driven by a baldie. If got Japanese hunk, I brave the Tokyo traffic & chase the car liao.