I will be spending a few days in Vienna soon and I was planning a day trip to Bratislava on my arrival day. I have found train schedules and fares easily enough on OBB's site. I intend to travel to Bratislava by train from the main station, since I will be taking the IC/Railjet from the airport to Wien Hbf. I would like to take the Twin City Liner for the return trip to Vienna, however I can't find any information on purchasing tickets in Bratislava. The only information I can find mentions purchasing from the ticket office at Schwedenplatz.
So, can I purchase a one-way ticket for the Twin City Liner in Bratislava or is it only available at Schwedenplatz or online?