Glass cannot be infinitely recycled, as they point out later on, glass containers can be recycled, but not windows. it gets more contaminates in. Also colour glass needs to be treated separately.
They also seem to not understand that melting glass eats a fucktonne of power.
From my reading of this: https://www.nrel.gov/docs/legosti/old/5703.pdf Using 100% recycled glass only reduces energy use from 4.3 megawatt hour per ton(for virgin glass) to 3.8mwhr per ton
By far the biggest saving is to reuse the bottles.
unless i've missed something, this article is pure horse shit.