Code snippets : Unzip file in PowerShell

Recently I needed to unzip file from PowerShell script. Here is result what I did use to achieve that:

$archiveDir = "C:\Downloads"
$fileZip = $archiveDir + "\file.zip"
$shell=new-object -com shell.application
$zip = $shell.NameSpace($fileZip)
foreach ($item in $zip.items())
{
 $shell.NameSpace($archiveDir).CopyHere($item)
}