Check the links given but I am not sure if you can use them as a private person for a one-off.

What won't help you now but after christmas there is "zweimal Weihnachten" where you can bring a parcel to the Post with food items. There are some rules re expiary date. https://www.2xweihnachten.ch/de/

Please let us know if you were sucessful. Might be useful for others as well.