How about we go back to cardboard boxes instead of the damned plastic packaging
Probably heavier and bulkier for the same amount of contents, so the trucks transporting goods to the store will carry less stuff (so there will be more trucks) and burn more fuel. Same with using glass bottles instead of plastic. With food, you also run the risk of increasing damage done to anything fragile, like fruit, if they're not fairly snug in their package - so bundling them loose into bigger boxes means more waste from the squashed/bruised ones.
There may well be better options for packaging; the way the world works now is set up to incentivise minimising cost rather than environmental impact, but some costs also have environmental impacts attached or correlated (fuel especially). It's not as simple as just "get rid of plastic".