We never had bottles of fizzy pop at home, but my Grandmother used to have dandelion and burdock, or sometimes icecream soda, so it was a huge treat to have a sparkling drink when staying with her.
We didn't eat crisps as an everyday snack, ( actually we rarely snacked between meals,) but occasionally crisps would appear if we were having a special celebratory drink, so a bowl of crisps seemed the hight of luxury!