Sane ZIP functions for your PowerShell profile. Create a ZIP archive of a specified directory in the current location without nesting.

ZipFile.ps1

function MkZip {
    [CmdletBinding()]
    param (
        [Parameter(
            Mandatory = $true,
            ValueFromPipeline = $true
        )]
        [string]$Directory
    )

    [System.IO.DirectoryInfo]$DirectoryInfo = $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath($Directory)
    Compress-Archive `
        -Path "$($DirectoryInfo.FullName)*" `
        -DestinationPath (Join-Path (Get-Location) "$($DirectoryInfo.BaseName).zip") `
        -CompressionLevel Optimal
}

function ExpZip {
    [CmdletBinding()]
    param (
        [Parameter(
            Mandatory = $true,
            ValueFromPipeline = $true
        )]
        [string]$File
    )

    [System.IO.FileInfo]$FileInfo = $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath($File)
    Expand-Archive -Path $FileInfo.FullName -DestinationPath (Join-Path (Get-Location) $FileInfo.BaseName)
}