diff --git a/container/set/interface.go b/container/set/interface.go
new file mode 100644
index 0000000..eb3646c
--- /dev/null
+++ b/container/set/interface.go
@@ -0,0 +1,28 @@
+package set
+
+var x = struct{}{}
+
+type Set map[any]struct{}
+
+func (s *Set) Init() {
+	for k := range *s {
+		delete(*s, k)
+	}
+}
+
+func (s *Set) Add(e any) {
+	(*s)[e] = x
+}
+
+func (s *Set) Remove(e any) {
+	delete(*s, e)
+}
+
+func (s *Set) Contains(e any) bool {
+	_, c := (*s)[e]
+	return c
+}
+
+func New() *Set {
+	return new(Set)
+}