Why is the United States so hell bent on not using the metric system? The Imperial system doesn't even make sense, with the metric system everything revolves around units of 100.
We're trying, a lot of products are labeled with both customary units and SI units, and it's led to this weird amalgam in some cases. For example we sell drinks on both scales. We have 12 fl oz, 16 fl oz, 16.9 fl oz (.5 mL), 24 fl oz, 1 liter, 2 liter, etc. For example, this bottle of Mountain Dew I have is labeled "24 FL OZ (1.5 PT) 710 mL." I agree though, we should make the metric system standard. We should start teaching it as the primary means of measurement in schools, and maybe for a while still display customary units so as not to completely confuse people but make them the secondary label in parentheses instead. You know how Americans can be though, it seems half our population is still saying "learn English or get out" so it may be a while before we come around to switching measurement systems too.