This preparation of vitamin B12 by manufacturer BjökoVit comes in a small brown glass bottle and contains 30 ml in about 600 droplets of this supplemet. It contains the vitamins bioavailable form methylcobalamin.
The manufacturer recommends 250 µg a day, which equals about 5 droplets. With this dosage the content lasts about 120 days - so about 4 months. This makes less than 17 cents per day.
Simply drop your daily dosage under your tounge and the vitamin can be absorbed via your oral mucosa.