CSS3 Flex: Pull child to the right

here's what I have Fiddle

ul {
  display: flex;
  justify-content: flex-start;
  flex-direction: row;
  align-items: center;
  width: 100%;
  height: 100px;
  background: #333;
  padding: 15px;
}

ul li {
  padding: 15px;
  margin: 5px;
  background: #efefef;
  border: 1px solid #ccc;
  display: inline-block;
  list-style: none;
}

#item-1 {
  height: 50px;
}

#item-2 {
  height: 70px;
}

<ul>
  <li id="item-1">Home</li>
  <li id="item-2">Menu</li>
  <li>More</li>
  <li>Stuff</li>
  <li>Settings</li>
</ul>

I want the last item inside the flex-box to be pulled to the right ("Settings" in my fiddle) while keeping all other items the way they are. The "Settings"-item should also be centered vertically and everything.

align-self: flex-end pushes the item to the bottom (I want it on the right).

I would very much prefer a solution using flex-box because my items have variable heights and should always be centered vertically.

What is the cleanest way to achieve this?

Thanks for your help!

Simple fix, use an auto-adjusting margin:

ul li:last-child {
	margin-left: auto;
}

You may also want to not use width: 100% so that the element stays inside the visible area:

ul {
	display: flex;
	justify-content: flex-start;
	flex-direction: row;
	align-items: center;
	/* width: 100%; */
	height: 100px;
	background: #333;
	padding: 15px;
}

http://jsfiddle.net/dwLHE/

See also https://www.w3.org/TR/css-flexbox-1/#auto-margins