From this year champagne is lighter. Each new empty bottle now weighs 835g, down 65g from the old standard of 900g. It is one way for the Comité interprofessionel du vin de Champagne to reduce carbon emissions. By 2020, all the bottles will be thinner.
As loyal Tourangeaux, we prefer the much better value
Vouvray or Crémant de Loire.
It is a response to consumer demand. Customers these days want to know what the environmental footprint of a product is and lighter bottles means less energy and materials consumed in manufacturing and in transportation. Maybe it also means reduced costs which can be passed on to consumers, but this does not always follow.