gistfile1.js

// Specify which values to use in template
{{drop-down items=types value=item.value name=item.name}}
or
{{drop-down items=types value=item.id name=item.name}}

// Drop-down component template
{{#each items as | item |}}
<option value="{{value}}">{{name}}</option>
{{/each}}

// I suppose you can't always rely on it being called item so relaly I'd want to do something like:

{{drop-down items=types value=id name=name}}

{{#each items as | item |}}
<option value="{{item}}.{{value}}">{{item}}.{{name}}</option>
{{/each}}