<div class="circle">
  <h3>{{ nbCoffee }} Coffee<span ng-if="nbCoffee>1">s</span><br>already drunk</h3>
  <p>
    <span class="coffee0" ng-click="changeNbCoffee(0)">
      <i class="fa fa-remove"></i>
    </span>
    <span ng-repeat="nb in getNumber(max) track by $index" ng-class="{drunk: nbCoffee >= ($index+1)}" ng-click="changeNbCoffee($index+1)">
      <i class="fa fa-coffee"></i>
    </span>
  </p>
</div>