30 day random blog challenge : day 10, if you could only live off one food and one beverage for rest of your days what would it be ?

So been wile off from my 30 day challenge as been away to scotland . (Later more on it) but I thought I get back to it where I left off . And it is day 10 : if you could only live off one food and one beverage for the rest of the life , what would it be ?
Well for beverage there is no doubt about it . Diet coca cola . Its my all time favorite drink I’m nt keen on normal one because its not as sweet but the diet one is just yum . Food ways its bit harder to chose cos sadly at moment I’m crazy about big mac I recently discovered its goodnes so a few have gone down my troth but I love the russian salad too ( leave recepie for it later ) its amazing so I’d prob create a weird mix of the too and call it food lol .