diff --git a/example/metall_containers.cpp b/example/metall_containers.cpp
index c1077f82..1ab379d6 100644
--- a/example/metall_containers.cpp
+++ b/example/metall_containers.cpp
@@ -16,6 +16,18 @@
 #include <metall/container/priority_queue.hpp>
 #include <metall/container/string.hpp>
 
+// Boost 1.81 or later is required
+#if BOOST_VERSION >= 108100
+#include <metall/container/unordered_flat_map.hpp>
+#include <metall/container/unordered_flat_set.hpp>
+#endif
+
+// Boost 1.82 or later is required
+#if BOOST_VERSION >= 108200
+#include <metall/container/unordered_node_map.hpp>
+#include <metall/container/unordered_node_set.hpp>
+#endif
+
 using namespace metall;
 namespace mc = metall::container;
 
@@ -33,7 +45,8 @@ int main() {
   mg.construct<mc::set<int>>("set")(mg.get_allocator());
   mg.construct<mc::multiset<int>>("multiset")(mg.get_allocator());
 
-  mg.construct<mc::unordered_map<int, int>>("umap")(mg.get_allocator());
+  mg.construct<mc::unordered_map<int, int>>("unordered_map")(
+      mg.get_allocator());
   mg.construct<mc::unordered_multimap<int, int>>("unordered_multimap")(
       mg.get_allocator());
 
@@ -41,6 +54,20 @@ int main() {
   mg.construct<mc::unordered_multiset<int>>("unordered_multiset")(
       mg.get_allocator());
 
+#if BOOST_VERSION >= 108100
+  mg.construct<mc::unordered_flat_map<int, int>>("unordered_flat_map")(
+      mg.get_allocator());
+  mg.construct<mc::unordered_flat_set<int>>("unordered_flat_set")(
+      mg.get_allocator());
+#endif
+
+#if BOOST_VERSION >= 108200
+  mg.construct<mc::unordered_node_map<int, int>>("unordered_node_map")(
+      mg.get_allocator());
+  mg.construct<mc::unordered_node_set<int>>("unordered_node_set")(
+      mg.get_allocator());
+#endif
+
   mg.construct<mc::vector<int>>("vector")(mg.get_allocator());
 
   mg.construct<mc::stack<int>>("stack")(mg.get_allocator());
diff --git a/include/metall/container/unordered_flat_map.hpp b/include/metall/container/unordered_flat_map.hpp
new file mode 100644
index 00000000..ecca824c
--- /dev/null
+++ b/include/metall/container/unordered_flat_map.hpp
@@ -0,0 +1,28 @@
+// Copyright 2023 Lawrence Livermore National Security, LLC and other Metall
+// Project Developers. See the top-level COPYRIGHT file for details.
+//
+// SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+#ifndef METALL_CONTAINER_UNORDERED_FLAT_MAP_HPP
+#define METALL_CONTAINER_UNORDERED_FLAT_MAP_HPP
+
+#include <functional>
+
+static_assert(BOOST_VERSION >= 108100, "Unsupported Boost version");
+#include <boost/unordered/unordered_flat_map.hpp>
+
+#include <metall/metall.hpp>
+
+namespace metall::container {
+
+/// \brief An unordered_flat_map container that uses Metall as its default
+/// allocator.
+template <class Key, class T, class Hash = std::hash<Key>,
+          class KeyEqual = std::equal_to<Key>,
+          class Allocator = manager::allocator_type<std::pair<const Key, T>>>
+using unordered_flat_map =
+    boost::unordered_flat_map<Key, T, Hash, KeyEqual, Allocator>;
+
+}  // namespace metall::container
+
+#endif  // METALL_CONTAINER_UNORDERED_FLAT_MAP_HPP
diff --git a/include/metall/container/unordered_flat_set.hpp b/include/metall/container/unordered_flat_set.hpp
new file mode 100644
index 00000000..24c63264
--- /dev/null
+++ b/include/metall/container/unordered_flat_set.hpp
@@ -0,0 +1,28 @@
+// Copyright 2023 Lawrence Livermore National Security, LLC and other Metall
+// Project Developers. See the top-level COPYRIGHT file for details.
+//
+// SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+#ifndef METALL_CONTAINER_UNORDERED_FLAT_SET_HPP
+#define METALL_CONTAINER_UNORDERED_FLAT_SET_HPP
+
+#include <functional>
+
+static_assert(BOOST_VERSION >= 108100, "Unsupported Boost version");
+#include <boost/unordered/unordered_flat_set.hpp>
+
+#include <metall/metall.hpp>
+
+namespace metall::container {
+
+/// \brief An unordered_flat_set container that uses Metall as its default
+/// allocator.
+template <class Key, class Hash = std::hash<Key>,
+          class KeyEqual = std::equal_to<Key>,
+          class Allocator = manager::allocator_type<Key>>
+using unordered_flat_set =
+    boost::unordered_flat_set<Key, Hash, KeyEqual, Allocator>;
+
+}  // namespace metall::container
+
+#endif  // METALL_CONTAINER_UNORDERED_FLAT_SET_HPP
diff --git a/include/metall/container/unordered_node_map.hpp b/include/metall/container/unordered_node_map.hpp
new file mode 100644
index 00000000..07af8ea8
--- /dev/null
+++ b/include/metall/container/unordered_node_map.hpp
@@ -0,0 +1,28 @@
+// Copyright 2023 Lawrence Livermore National Security, LLC and other Metall
+// Project Developers. See the top-level COPYRIGHT file for details.
+//
+// SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+#ifndef METALL_CONTAINER_UNORDERED_NODE_MAP_HPP
+#define METALL_CONTAINER_UNORDERED_NODE_MAP_HPP
+
+#include <functional>
+
+static_assert(BOOST_VERSION >= 108200, "Unsupported Boost version");
+#include <boost/unordered/unordered_node_map.hpp>
+
+#include <metall/metall.hpp>
+
+namespace metall::container {
+
+/// \brief An unordered_node_map container that uses Metall as its default
+/// allocator.
+template <class Key, class T, class Hash = std::hash<Key>,
+          class KeyEqual = std::equal_to<Key>,
+          class Allocator = manager::allocator_type<std::pair<const Key, T>>>
+using unordered_node_map =
+    boost::unordered_node_map<Key, T, Hash, KeyEqual, Allocator>;
+
+}  // namespace metall::container
+
+#endif  // METALL_CONTAINER_UNORDERED_NODE_MAP_HPP
diff --git a/include/metall/container/unordered_node_set.hpp b/include/metall/container/unordered_node_set.hpp
new file mode 100644
index 00000000..2616a12e
--- /dev/null
+++ b/include/metall/container/unordered_node_set.hpp
@@ -0,0 +1,28 @@
+// Copyright 2023 Lawrence Livermore National Security, LLC and other Metall
+// Project Developers. See the top-level COPYRIGHT file for details.
+//
+// SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+#ifndef METALL_CONTAINER_UNORDERED_NODE_SET_HPP
+#define METALL_CONTAINER_UNORDERED_NODE_SET_HPP
+
+#include <functional>
+
+static_assert(BOOST_VERSION >= 108200, "Unsupported Boost version");
+#include <boost/unordered/unordered_node_set.hpp>
+
+#include <metall/metall.hpp>
+
+namespace metall::container {
+
+/// \brief An unordered_node_set container that uses Metall as its default
+/// allocator.
+template <class Key, class Hash = std::hash<Key>,
+          class KeyEqual = std::equal_to<Key>,
+          class Allocator = manager::allocator_type<Key>>
+using unordered_node_set =
+    boost::unordered_node_set<Key, Hash, KeyEqual, Allocator>;
+
+}  // namespace metall::container
+
+#endif  // METALL_CONTAINER_UNORDERED_NODE_SET_HPP