Too bad non-L lens don’t come with a lens hood… you really do need one most of the time. I looked at the Canon EW73B, but being somewhat of a cheapskate, I couldn’t justify spending $30 on a 5 cent piece of plastic.
I found a third party replacement on eBay, and decided to give it a try. Summary: It works great!
The packaging is simple. Plain, white box with plastic bag holding the plastic hood. The quality is pretty good. If too much pressure is applied, it will pop off without breaking.
There are two “entry” points on the lens… you insert and rotate 45 degrees. The words are only on one side, so they can be on the top or bottom of the lens.
And, yes, the hood can be installed backwards for transport.