Sleepbox, a futuristic capsule hotel in Moscow, can accommodate more than 100 people in its sleeping cells.
The wood cells are very bare-bones.
The bed in Moscow's Sleepbox can fit one person.
Here's a single capsule Sleepbox hotel room, shown in Russia's Sheremetyevo International Airport outside Moscow.
Capsule hotels were originally meant for businessmen who stayed out late working or partying, but now they're also attracting travelers on a budget.
This capsule hotel and sauna in Tokyo has a control panel built in for the room.
Rooms in China's largest capsule hotel in Qingdao, Shandong province, cost about $7 a day and come equipped with a TV, WiFi connection, computer desk, dresser and bedding.
Here's what the rooms look like from the outside.
This is a room in China's first capsule hotel in Shanghai. Local media reported that authorities have been concerned about fire safety and personal security risks.
These capsule beds in Hong Kong have adjustable ceilings, an air conditioner and a TV. They cost $450 a month or $30 a night.
Capsule hotel rooms don't leave much space for storage, so some have separate locker areas.
A capsule hotel in Tokyo offers coin-operated washing machines for guests.
It also has a lounge area.
Many of the micro-hotels have communal bathing areas.
An exterior shot of a Tokyo capsule hotel in 2008.
