If you want to sleep while standing, the Koyoju company in Japan has something for you – the "Giraffenap" booth. This ingenious pod lets people nap in a vertical position. Office workers can now catch forty winks without a bed. The designers say a 20-minute nap improves performance, memory, concentration and productivity by reducing fatigue. The pods come in two designs and will go on sale in December. They are expected to cost around $20,000.

The designers say people work non-stop without a chance to recover from stress. This makes us sleepy during the day. They said: "It's time to break the stereotype that nodding off on the job is a sign of boredom or laziness." Napping reduces drowsiness and improves ingenuity and creativeness. A nap of just 15 to 20 minutes is best and should end before 3 p.m. In addition, you should not lie down as this leads to deep sleep.