I’m planning to book my tickets for Interlaken-Basel SBB on SBB Mobile, and I found an option for “Suppersaver Ticket” with a decription as “Reduced prices for Half-Fare travelcard holders, children between 6-15……”. My question is whether it means such suppersaver ticket is only available for a half fare travelcard holder, or the price can be further reduced if a half fare travelcard holder choose it.