You reminded me of something that's been bothering me recently.

Standard cans of tuna in water list a "net weight" of 6.5 oz. While I understand the concept when it's applied to boxes of cereal (it's the weight of the product minus the packaging), does net weight for a can of tuna include the weight of the water?

It seems like it does, but it also seems like a misleading practice because most cans of tuna I've opened these days seem to be about 1/2 water (unlike years ago).

With extra water being added to chicken and turkey (and maybe pork and beef for all I know), it seems like cans of tuna and other foods packed in water or liquid (jars and cans of pickles, olives, beans, tomatoes, pigs feet, etc., etc.) should be sold with a listing of (Net weight - liquid) as well. Packages of fresh chicken apparently have to list the water added - other foods should as well. People should know how much stuff they're buying. If liquids are included in the net weight then it's little better than selling the stuff by volume.

Cheers,
Scott.