This week's topic is: Lunch Box Part 2: Store-bought
Vocabulary:
on offer: being sold, being available for purchase
additives (n.): (usually artificial) colourings, flavourings, preservatives, etc
shelf life (n.): the time a product can be safely consumed (before going bad)
milestone (n.): an important step in a process
skyrocket (v.): rise sharply
a thing of the past (n.): something that no longer exists or is no longer relevant; [be] all about … : mainly focused on …
… is the main point
admittedly (adv.): to be honest, [one] must admit
thatperishable (adj.): has a short shelf life