To easily and economically recycle pet bottles of which recycling has been very expensive due to various labels such as trademark, etc.

A label 1, where a trademark indication part 2, an original material indication part 3, remarks 4, etc., are printed on a sheet of paper, plastic film, etc., is labeled around a container. On a surface labeling this label 1, a removable adhesive layer like Post-it (a brand name), etc., is formed, and the label is adhered on a PET bottle 5 with this removable type adhesive. Moreover, on a meeting part of both ends 1a, 1b of the label 1 on the back of the bottle, an additional seal 6 is adhered so as to prevent this label 1 from being removed (especially, intentional removal) from the bottle during distribution stage of the commodity. When PET containers 5 are abandoned after a consumption stage, this label 1 is peeled off from the containers 5. For instance, the label can be removed from PET bottle 5 very easily, and PET bottles in this state are transferred to recycling process after collected.