Infinite recyclability. Metal packaging: Metal is a permanent material, which means it can be infinitely recycled without any loss of quality and, as such, can form part of a circular economy – a key driver in the elimination of waste. However, critics of the material may note that the production of aluminum for packaging produces a higher rate of CO2 emissions when compared to other packaging materials – such as plastic. One of the key innovations regarding the metal material came from Carlsberg. The Danish brewery launched the Snap Pack, a design which eliminates the need for a plastic ring on six packs, and instead bonds beer cans together with recyclable glue. The technology is set to reduce plastic waste globally by more than 1200 tons a year – the equivalent to 60 million plastic bags, according to the brewery. The Snap Pack is a world first for the beer industry, reducing the amount of plastic used in traditional multi-packs by up to 76 percent.