The Problems with Pimple - What's wrong with this picture?

pimple-example.php

<?php
$container = new Pimple();
$container['auth'] = function($c) {
	return new OAuth();
};
$container['db'] = function($c) {
	return new DB();
};
$container['tweet_service'] = function($c) {
	$twService = new TwitterService();
	$twService->setDB($c['db']);
	$twService->setOauth($c['oauth']);
	return $twService;
};
$container['soclal_feeds'] = function($c) {
	$socialFeeds = new SocialFeeds();
	$socialFeeds->setTwitterService($c['tweet_servlce']);
	return $socialFeeds;
};

$socialFeeds = $container['social_feeds'];
$socialFeeds->getSocialFeeds();