There was a kitchen revolution in the 1970s: Dazey’s “Seal-A-Meal”. With this bag sealer you could store away leftovers or make separate portions of what you had prepared, then pile them up in the fridge or freezer. Everyone and their brother had one; several other companies copied the product.
That lady’s hair, wow.
(The above model from a church rummage sale is a better deal at $3.)
Seal-a-Meal still exists as a brand from Sunbeam, but instead of just heat-sealing a bag they now vacuum pack before sealing for extra freshness.