Sanpellegrino (of San Pellegrino) Sparkling Mineral Water, 12 pack of 1,000ml (1l) on Amazon is down to $20, or $18 with Subscribe & Save.
Comes to $1.67 per bottle, or just $1.50 per bottle with Subscribe & Save.
PET bottles (unfortunately no glass for this price), potential $0.10 per bottle refund for container returns (now in all states except TAS, which will start in 2024.)
With "transitional" inflation messing up with the cost of everything, Sanpellegrino 1l is now usually around $4 per bottle in stores. It hasn't been on sale this cheap since 2020.