The utterly delightful site dedicated to classifying plastic bread tags
inputmag.com
inputmag.com
It reads like an SCP off-shoot; I love it!
Perhaps manufacturers see them as a customer convenience, to 'reseal' the bag when removing slices of bread. But a more environmental option would be to heat-seal the bag with some excess length, so customers could just cut the seal off, and then use their own (metal, wood, designer, whatever) clips/pegs to seal the bag. Or just move the loaf to a bread bin.
With these things, excessive plastic aside, nothing tells you it hasn't already been opened in the shop which is a bit weird. People have probably touched your fruit and vegetables, but they're going to be washed at least, and not being bagged there's no expectation that they haven't been. Just seemed a bit odd because it's unusual to me I suppose.
Milk bags still come with plastic ties, but that might be because milk is much heavier and condensation could potentially cause the cardboard ties to get soggy.
A larger bag contains three 1.33 L sealed, transparent bags of milk (4L total). Pop the bag into a jug (special jugs are sold for this, but any old jug will work) and cut one corner off to pour it. Minimal waste, super easy to pour, no lid required, doesn't take up so much room in the fridge, doesn't take up so much room on the dinner table... what's not to love?
It's a single use plastic with no chance of reuse.
[0] https://www.youtube.com/watch?v=VTPgd4HUk4w
[1] https://www.thestar.com/news/ontario/2010/02/04/so_we_drink_...
And, as for the paper/cardboard thingies, the website is up on them too and is eagerly monitoring the developing situation:
We've long used wooden clothespins and/or office-supply binder clips.