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Blind people. Soda cans. Any other food cans. They don't mix.
Most food can be felt to determine what it is, but not cans. Many blind people have to get help to get the right type of canned food, and when they get home, they make up a little Braille card-label and stick it on the can.
This is highly
irritating to the blind, trying to determine the contents of a can. Would it not be very simple to add little Braille dots onto the tops and lids of jars, describing the contents? I imagine they would find it highly useful.
I checked, and all I could find on this problem were that some blind people make their own labels and stick them on after they buy the product (with someone else's help).
Not only would this be useful for blind people, but also useful when fishing around in the icechest, if you do it fast before your fingers numb.
Braille On Cans
Actually, [Rods Tiger] covered this on the halfbakery some time ago. This copy of his idea from the Wayback Machine doesn't include the many links that were appended to the original idea. [jurist, Mar 17 2006]
Braille Food Package Identification
Here's a real-world example of a manufacturer applying braille identification to the lid of their mozzarella container. [jurist, Mar 17 2006]
||Given that these things could simply be printed on with the labels, excellent notion!
||Many cans and jars already have raised lettering, making implementation very easy.
||Much gratefulness to you, xenzag, as for the proper speaking of English is not native to my Texas-ness.
||This idea has been discussed here on at least one other occasion. [See link] Also, a quick check around shows that several bottlers and food producers do already incorporate braille markings in their packaging.
||Incidentally, this idea would have been better categorized under Food: Packaging: Labeling.