Replacing the PET bottle after the expiry date should be essential for safety reasons. After the expiry date, the plastic of the PET bottle may be weakened and is no longer suitable for carbonated water. However, the expiry date requires regular use. With little or no use, the period should be extended accordingly. However, this statement is without guarantee. I currently use my bottle beyond the expiry date according to this motto. I avoid any excessive pressure in the bottles.
The offer for Fr 91.- does not come from Digitec itself but from the third-party supplier Long Island GmbH CH.
https://helpcenter.digitec.ch/hc...
The pricing of these products generally attracts negative attention on the Digitec/Galaxus sales platform.
worth reading --> https://www.digitec.ch/de...
It's OK for Digitec, you don't have to buy it and they earn money from sales.