Simple 24 Time Zone Barrel Clock February 26, 2007 Simple but effective. This world time clock has 12 sides so to see what the time is in different countries or cities simply roll the clock so that the city you’re interested in is at the top. Available from MoMA store for $74, found via New Launches. Related Reads Best Sunrise Alarm Clock Our favorite sunrise alarm clock is the Philips SmartSleep HF3670/60. It comes with a Sleep Mapper app for improved sleep hygiene and a special breathing light that can make falling asleep a lot easier.