Very Mad!

Send it to me - I like my soda flat! :o)

Return it to the place of purchase. They should reimburse you.
You did not include the lot number from these cans either so how is
anyone to figure out how long you had these.

You could also make a phone call to them about this and like Olie
says, they may send you something too.

seems to be that he should have included the package information in
the body of his letter so Pepsi would be able to easily identify the
source and help them determine the particulars of the case.

Presumably, and according to the other commenters who suggest he
should have put that info in his letter, once Pepsi has that info,
they can and should reimburse him. Which means they would have to
contact him.

If they're going to contact him anyways, why can't they get the
package info at that point?

And if they're NOT going to contact him, then what difference does it
make if he includes the package info or not?

why not hedge the bet and include the info. I contacted a company
directly and on the reply was asked for more info. I should've put it
in the first email.

I still think it's best to include as much information as possible the
first time around. It allows them to investigate immediately and then
contact you with their solution.

I've been helping out this week at my company's Help Desk because
they're short staffed. Since I'm not familiar with all the systems
much of what I'm doing is taking messages and passing them on to the
two remaining analysts. In all cases, I pressed the user to provide
me with more information than a call back number.

By doing it this way, I was able to pass as much information along to
the analysts and 90% of the time they were able to resolve the issue
without contacting the user for more information. Then they could
place one simple call back to the user with the resolution. Result,
greater efficieny and happier users.

I feel the same principle applies here. The more information provided
allows for a quicker resolution to your complaint rather than have it
land in the "call back for more info" pile.

that by the time the person writes a letter, the packaging has already
been discarded, so it's kind of a moot point. But that's just my
assumption.