Do you buy branded milk from the supermarket to support farmers?

My wife had been drinking Pauls Low Fat Physical milk for years prior to Coles deleting it but every empty plastic bottle would have a large amount of residual calcium stuck in the bottom which took some effort to remove prior to placing the bottle in the yellow bin.

She now drinks Dairy Farmers Lite White milk, also not stocked by our local Coles, which lists a lower percentage of calcium in the Nutrition Panel but leaves no residual calcium in th empty bottles.

The Pauls product lists 175mg of calcium per 100ml whilst the Dairy Farmers product lists 118mg per 100ml but effectively the extra calcium in the Pauls product was totally wasted.

Perhaps because the Dairy Farmers product is actually made in Malanda in FNQ, they are simply smarter than Pauls.