diff --git a/src/dropdown/dropdown.js b/src/dropdown/dropdown.js
index 39789fa9f6..01bdf72e3a 100644
--- a/src/dropdown/dropdown.js
+++ b/src/dropdown/dropdown.js
@@ -1,14 +1,33 @@
-angular.module('ui.bootstrap.dropdown', ['ui.bootstrap.position'])
+angular.module('ui.bootstrap.dropdown', ['ui.bootstrap.multiMap', 'ui.bootstrap.position'])
 
 .constant('uibDropdownConfig', {
   appendToOpenClass: 'uib-dropdown-open',
   openClass: 'open'
 })
 
-.service('uibDropdownService', ['$document', '$rootScope', function($document, $rootScope) {
+.service('uibDropdownService', ['$document', '$rootScope', '$$multiMap', function($document, $rootScope, $$multiMap) {
   var openScope = null;
+  var openedContainers = $$multiMap.createNew();
+
+  this.isOnlyOpen = function(dropdownScope, appendTo) {
+    var openedDropdowns = openedContainers.get(appendTo);
+    if (openedDropdowns) {
+      var openDropdown = openedDropdowns.reduce(function(toClose, dropdown) {
+        if (dropdown.scope === dropdownScope) {
+          return dropdown;
+        }
+
+        return toClose;
+      }, {});
+      if (openDropdown) {
+        return openedDropdowns.length === 1;
+      }
+    }
 
-  this.open = function(dropdownScope, element) {
+    return false;
+  };
+
+  this.open = function(dropdownScope, element, appendTo) {
     if (!openScope) {
       $document.on('click', closeDropdown);
     }
@@ -18,14 +37,52 @@ angular.module('ui.bootstrap.dropdown', ['ui.bootstrap.position'])
     }
 
     openScope = dropdownScope;
+
+    if (!appendTo) {
+      return;
+    }
+
+    var openedDropdowns = openedContainers.get(appendTo);
+    if (openedDropdowns) {
+      var openedScopes = openedDropdowns.map(function(dropdown) {
+        return dropdown.scope;
+      });
+      if (openedScopes.indexOf(dropdownScope) === -1) {
+        openedContainers.put(appendTo, {
+          scope: dropdownScope
+        });
+      }
+    } else {
+      openedContainers.put(appendTo, {
+        scope: dropdownScope
+      });
+    }
   };
 
-  this.close = function(dropdownScope, element) {
+  this.close = function(dropdownScope, element, appendTo) {
     if (openScope === dropdownScope) {
       $document.off('click', closeDropdown);
       $document.off('keydown', this.keybindFilter);
       openScope = null;
     }
+
+    if (!appendTo) {
+      return;
+    }
+
+    var openedDropdowns = openedContainers.get(appendTo);
+    if (openedDropdowns) {
+      var dropdownToClose = openedDropdowns.reduce(function(toClose, dropdown) {
+        if (dropdown.scope === dropdownScope) {
+          return dropdown;
+        }
+
+        return toClose;
+      }, {});
+      if (dropdownToClose) {
+        openedContainers.remove(appendTo, dropdownToClose);
+      }
+    }
   };
 
   var closeDropdown = function(evt) {
@@ -244,10 +301,18 @@ angular.module('ui.bootstrap.dropdown', ['ui.bootstrap.position'])
     }
 
     var openContainer = appendTo ? appendTo : $element;
-    var hasOpenClass = openContainer.hasClass(appendTo ? appendToOpenClass : openClass);
+    var dropdownOpenClass = appendTo ? appendToOpenClass : openClass;
+    var hasOpenClass = openContainer.hasClass(dropdownOpenClass);
+    var isOnlyOpen = uibDropdownService.isOnlyOpen($scope, appendTo);
 
     if (hasOpenClass === !isOpen) {
-      $animate[isOpen ? 'addClass' : 'removeClass'](openContainer, appendTo ? appendToOpenClass : openClass).then(function() {
+      var toggleClass;
+      if (appendTo) {
+        toggleClass = !isOnlyOpen ? 'addClass' : 'removeClass';
+      } else {
+        toggleClass = isOpen ? 'addClass' : 'removeClass';
+      }
+      $animate[toggleClass](openContainer, dropdownOpenClass).then(function() {
         if (angular.isDefined(isOpen) && isOpen !== wasOpen) {
           toggleInvoker($scope, { open: !!isOpen });
         }
@@ -270,10 +335,10 @@ angular.module('ui.bootstrap.dropdown', ['ui.bootstrap.position'])
       }
 
       scope.focusToggleElement();
-      uibDropdownService.open(scope, $element);
+      uibDropdownService.open(scope, $element, appendTo);
     } else {
       $document.off('keydown', uibDropdownService.keybindFilter);
-      uibDropdownService.close(scope, $element);
+      uibDropdownService.close(scope, $element, appendTo);
       if (self.dropdownMenuTemplateUrl) {
         if (templateScope) {
           templateScope.$destroy();
diff --git a/src/dropdown/index-nocss.js b/src/dropdown/index-nocss.js
index 3234abba0a..690d7008ff 100644
--- a/src/dropdown/index-nocss.js
+++ b/src/dropdown/index-nocss.js
@@ -1,3 +1,4 @@
+require('../multiMap');
 require('../position/index-nocss.js');
 require('./dropdown');
 
diff --git a/src/dropdown/test/dropdown.spec.js b/src/dropdown/test/dropdown.spec.js
index 6f3b99d4e2..dce7542ba8 100644
--- a/src/dropdown/test/dropdown.spec.js
+++ b/src/dropdown/test/dropdown.spec.js
@@ -99,11 +99,11 @@ describe('uib-dropdown', function() {
       expect(elm1).not.toHaveClass(dropdownConfig.openClass);
       expect(elm2).not.toHaveClass(dropdownConfig.openClass);
 
-      clickDropdownToggle( elm1 );
+      clickDropdownToggle(elm1);
       expect(elm1).toHaveClass(dropdownConfig.openClass);
       expect(elm2).not.toHaveClass(dropdownConfig.openClass);
 
-      clickDropdownToggle( elm2 );
+      clickDropdownToggle(elm2);
       expect(elm1).not.toHaveClass(dropdownConfig.openClass);
       expect(elm2).toHaveClass(dropdownConfig.openClass);
     });
@@ -303,6 +303,37 @@ describe('uib-dropdown', function() {
     });
   });
 
+  describe('using dropdown-append-to with two dropdowns', function() {
+    function dropdown() {
+      return $compile('<div><div class="dropdown1" uib-dropdown dropdown-append-to="appendTo" on-toggle="log(1, open)"><a href uib-dropdown-toggle></a><ul class="dropdown-menu" uib-dropdown-menu id="dropdown-menu"><li><a href>Hello On Container</a></li></ul></div><div class="dropdown2" uib-dropdown dropdown-append-to="appendTo" on-toggle="log(2, open)"><a href uib-dropdown-toggle></a><ul class="dropdown-menu" uib-dropdown-menu id="dropdown-menu"><li><a href>Hello On Container</a></li></ul></div></div>')($rootScope);
+    }
+
+    beforeEach(function() {
+      $document.find('body').append(angular.element('<div id="dropdown-container"></div>'));
+
+      $rootScope.appendTo = $document.find('#dropdown-container');
+      $rootScope.log = jasmine.createSpy('log');
+
+      element = dropdown();
+      $document.find('body').append(element);
+    });
+
+    afterEach(function() {
+      // Cleanup the extra elements we appended
+      $document.find('#dropdown-container').remove();
+    });
+
+    it('should keep the class when toggling from one dropdown to another with the same container', function() {
+      var container = $document.find('#dropdown-container');
+
+      expect(container).not.toHaveClass('uib-dropdown-open');
+      element.find('.dropdown1 [uib-dropdown-toggle]').click();
+      expect(container).toHaveClass('uib-dropdown-open');
+      element.find('.dropdown2 [uib-dropdown-toggle]').click();
+      expect(container).toHaveClass('uib-dropdown-open');
+    });
+  });
+
   describe('using is-open', function() {
     describe('with uib-dropdown-toggle', function() {
       beforeEach(function() {
diff --git a/src/modal/index-nocss.js b/src/modal/index-nocss.js
index ac03531079..d3f8a94b7d 100644
--- a/src/modal/index-nocss.js
+++ b/src/modal/index-nocss.js
@@ -1,3 +1,4 @@
+require('../multiMap');
 require('../position/index-nocss.js');
 require('../stackedMap');
 require('../../template/modal/window.html.js');
diff --git a/src/modal/modal.js b/src/modal/modal.js
index 3fd0e9de2f..eeb79c101e 100644
--- a/src/modal/modal.js
+++ b/src/modal/modal.js
@@ -1,59 +1,4 @@
-angular.module('ui.bootstrap.modal', ['ui.bootstrap.stackedMap', 'ui.bootstrap.position'])
-/**
- * A helper, internal data structure that stores all references attached to key
- */
-  .factory('$$multiMap', function() {
-    return {
-      createNew: function() {
-        var map = {};
-
-        return {
-          entries: function() {
-            return Object.keys(map).map(function(key) {
-              return {
-                key: key,
-                value: map[key]
-              };
-            });
-          },
-          get: function(key) {
-            return map[key];
-          },
-          hasKey: function(key) {
-            return !!map[key];
-          },
-          keys: function() {
-            return Object.keys(map);
-          },
-          put: function(key, value) {
-            if (!map[key]) {
-              map[key] = [];
-            }
-
-            map[key].push(value);
-          },
-          remove: function(key, value) {
-            var values = map[key];
-
-            if (!values) {
-              return;
-            }
-
-            var idx = values.indexOf(value);
-
-            if (idx !== -1) {
-              values.splice(idx, 1);
-            }
-
-            if (!values.length) {
-              delete map[key];
-            }
-          }
-        };
-      }
-    };
-  })
-
+angular.module('ui.bootstrap.modal', ['ui.bootstrap.multiMap', 'ui.bootstrap.stackedMap', 'ui.bootstrap.position'])
 /**
  * Pluggable resolve mechanism for the modal resolve resolution
  * Supports UI Router's $resolve service
@@ -569,7 +514,7 @@ angular.module('ui.bootstrap.modal', ['ui.bootstrap.stackedMap', 'ui.bootstrap.p
               ariaHiddenCount = parseInt(sibling.getAttribute(ARIA_HIDDEN_ATTRIBUTE_NAME), 10);
 
             if (!ariaHiddenCount) {
-              ariaHiddenCount = elemIsAlreadyHidden ? 1 : 0;  
+              ariaHiddenCount = elemIsAlreadyHidden ? 1 : 0;
             }
 
             sibling.setAttribute(ARIA_HIDDEN_ATTRIBUTE_NAME, ariaHiddenCount + 1);
@@ -607,7 +552,7 @@ angular.module('ui.bootstrap.modal', ['ui.bootstrap.stackedMap', 'ui.bootstrap.p
           }
         );
       }
-      
+
       $modalStack.close = function(modalInstance, result) {
         var modalWindow = openedWindows.get(modalInstance);
         unhideBackgroundElements();
diff --git a/src/multiMap/index.js b/src/multiMap/index.js
new file mode 100644
index 0000000000..d3db908589
--- /dev/null
+++ b/src/multiMap/index.js
@@ -0,0 +1 @@
+require('./multiMap.js');
diff --git a/src/multiMap/multiMap.js b/src/multiMap/multiMap.js
new file mode 100644
index 0000000000..47bf6d4639
--- /dev/null
+++ b/src/multiMap/multiMap.js
@@ -0,0 +1,55 @@
+angular.module('ui.bootstrap.multiMap', [])
+/**
+ * A helper, internal data structure that stores all references attached to key
+ */
+  .factory('$$multiMap', function() {
+    return {
+      createNew: function() {
+        var map = {};
+
+        return {
+          entries: function() {
+            return Object.keys(map).map(function(key) {
+              return {
+                key: key,
+                value: map[key]
+              };
+            });
+          },
+          get: function(key) {
+            return map[key];
+          },
+          hasKey: function(key) {
+            return !!map[key];
+          },
+          keys: function() {
+            return Object.keys(map);
+          },
+          put: function(key, value) {
+            if (!map[key]) {
+              map[key] = [];
+            }
+
+            map[key].push(value);
+          },
+          remove: function(key, value) {
+            var values = map[key];
+
+            if (!values) {
+              return;
+            }
+
+            var idx = values.indexOf(value);
+
+            if (idx !== -1) {
+              values.splice(idx, 1);
+            }
+
+            if (!values.length) {
+              delete map[key];
+            }
+          }
+        };
+      }
+    };
+  });
diff --git a/src/modal/test/multiMap.spec.js b/src/multiMap/test/multiMap.spec.js
similarity index 96%
rename from src/modal/test/multiMap.spec.js
rename to src/multiMap/test/multiMap.spec.js
index c89624e914..40345144c9 100644
--- a/src/modal/test/multiMap.spec.js
+++ b/src/multiMap/test/multiMap.spec.js
@@ -1,7 +1,7 @@
 describe('multi map', function() {
   var multiMap;
 
-  beforeEach(module('ui.bootstrap.modal'));
+  beforeEach(module('ui.bootstrap.multiMap'));
   beforeEach(inject(function($$multiMap) {
     multiMap = $$multiMap.createNew();
   }));