Truth of the fact is that you should have around 2 L of fluid per day.  It
is, as you say a guideline.  The fluid can come in whatever form you want
from your morning cup of coffee to the afternoon bottle of water.  "Glasses"
generally refers to around 250 mL.

Phil

> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
> Of Paul Trusten, R.Ph.
> Sent: Thursday, July 27, 2006 6:22 PM
> To: U.S. Metric Association
> Subject: [USMA:37161] a glass of water
> 
> Putting aside the value of drinking 8 "glasses" of water a day, it seems
> that the makers of those large plastic driinking water containers we
> health-minded people use don't know exactly what a "glass" is.  I suppose
> that,generally, a "glass" in the U.S. is one U.S. cup of 240 mL. But, this
> afternoon at a local Walgreens, I found two different drinking cup
> products
> in an end cap basket full of them. One type was made in Chino, California,
> USA, and was labeled "64 oz" (sic) and "1.89 L." The other, country of
> origin unclear, was labeled "2.2 L (74 oz)."  The labels on each stated
> that
> each contained the recommended 8 glasses of water people should drink per
> day. On that basis, the former container yields a 236 mL "glass," while
> the
> latter yields a 275 mL "glass."
> 
> I suppose these products are designed only for approximate measurement,
> but
> when it comes down to cases, the measurement is sloppy, with an inexact
> term, "glass." We also have the term "ounce" once again misused, since
> "ounce" refers to weight, not volume (fluid ounce).
> 
> It seems that, when it comes to mass marketing, consumers don't care about
> exact measurement, but they do care about size.
> 
> 
> 
> Paul Trusten, R.Ph.
> Public Relations Director
> U.S. Metric Association, Inc.
> www.metric.org
> 3609 Caldera Boulevard, Apt. 122
> Midland TX 79707-2872 USA
> [EMAIL PROTECTED]
> 
> 
> 

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