Tokyo Metro and Metro Commerce will hold a gift campaign at METRO’S from March 1. During the campaign, when people buy three containers of FRISK, they will receive a free FRISK case with subway trains illustrated on it.
There are four variations and 1,000 items for each design. The illustrations include the new 1000 model of the Ginza line, the 07 model of the Tozai line transferred from the Yurakucho line, the 16000 model of the Chiyoda line, and the 08 model of the Hanzomon line.
The campaign will end when all 4,000 items are given out.
Source: Narinari.com