Toyo Seikan Co., Ltd, a consolidated subsidiary of Toyo Seikan Group Holdings Ltd., has developed the lightest aluminium DI can in the domestic market for 204mm SOT (stay-on tab) cans. 

Compression bottom reform (CBR) technology is used to reinforce the bottom of the beverage can, thus enabling it to be reduced in weight. This development should further reduce greenhouse gas (GHG) emissions. 

Toyo Seikan will begin mass production of the cans in April 2024 in 350ml and 500ml sizes at its Chitose and Kiyama factories, followed by other factories nationwide.

By using CBR in the 204mm SOT cans, which are mainly used for alcoholic beverages, Toyo Seikan has reduced the weight of the 350ml cans by 1.5g, from 11.7g to 10.2g, and the weight of the 500ml cans by 2.0g, from 15.0g to 13.0g.

The GHG emissions per can have thus been reduced by approximately 9% compared to the current 350ml and 500ml cans. Furthermore, if CBR is used for all aluminium beverage cans where it is applicable, it is estimated that GHG emissions will be reduced by approximately 40,000 tons annually.