First class is the most comfortable and advisable cabin option for those planning a Trans Siberian vacation on a regular Russian train. First Class cabins have a large window, offer 2 lower berths and a small table in between them. The “Kupe” or second class, is the second most popular train car type for those who plan to travel on the extensive Trans-Siberian railway onboard regular Russian trains. Such compartments accommodate four passengers each and have 2 upper and 2 lower berths. The Trans-Siberian railway cabin 3rd class is the least recommended travel option on Russian trains. Also named “Platzkart”, such cars are designed for 54 passengers, have no doors and feature extra double berths. This is the cheapest class on the Russian trains.