Water bottle Are you staying hydrated on that long–haul flight? This smart bottle (Hidrate, $55, Well.ca) radiates a gentle glow when it’s time for a sip. It records fluid intake and syncs results to a phone or fitness tracker.
Wearable, packable, do–it–all gadgets.
Watch This is the smartwatch ($250, Fitbit) for time–zone–hopping frequent flyers. Monitor how long you spend in various stages of sleep – perfect for adjusting your body clock after that eight–hour red–eye to Europe.