diff --git a/cache.go b/cache.go
index db88d2f..998b36f 100644
--- a/cache.go
+++ b/cache.go
@@ -1135,6 +1135,11 @@ func New(defaultExpiration, cleanupInterval time.Duration) *Cache {
 	return newCacheWithJanitor(defaultExpiration, cleanupInterval, items)
 }
 
+// Return a new Cacher interface
+func NewCacher(defaultExpiration, cleanupInterval time.Duration) Cacher {
+	return New(defaultExpiration, cleanupInterval)
+}
+
 // Return a new cache with a given default expiration duration and cleanup
 // interval. If the expiration duration is less than one (or NoExpiration),
 // the items in the cache never expire (by default), and must be deleted
@@ -1159,3 +1164,8 @@ func New(defaultExpiration, cleanupInterval time.Duration) *Cache {
 func NewFrom(defaultExpiration, cleanupInterval time.Duration, items map[string]Item) *Cache {
 	return newCacheWithJanitor(defaultExpiration, cleanupInterval, items)
 }
+
+// Return a new Cacher interface
+func NewCacherFrom(defaultExpiration, cleanupInterval time.Duration, items map[string]Item) Cacher {
+	return NewFrom(defaultExpiration, cleanupInterval, items)
+}
diff --git a/types.go b/types.go
new file mode 100644
index 0000000..af789ae
--- /dev/null
+++ b/types.go
@@ -0,0 +1,198 @@
+package cache
+
+import (
+	"io"
+	"time"
+)
+
+type Cacher interface {
+	// Add an item to the cache only if an item doesn't already exist for the given
+	// key, or if the existing item has expired. Returns an error otherwise.
+	Add(k string, x interface{}, d time.Duration) error
+	// Decrement an item of type int8 by n. Returns an error if the item's value is
+	// not an int8, or if it was not found. If there is no error, the decremented
+	// value is returned.
+	Decrement(k string, n int64) error
+	// Decrement an item of type float32 by n. Returns an error if the item's value
+	// is not an float32, or if it was not found. If there is no error, the
+	// decremented value is returned.
+	DecrementFloat(k string, n float64) error
+	// Decrement an item of type int16 by n. Returns an error if the item's value is
+	// not an int16, or if it was not found. If there is no error, the decremented
+	// value is returned.
+	DecrementFloat32(k string, n float32) (float32, error)
+	// Decrement an item of type float64 by n. Returns an error if the item's value
+	// is not an float64, or if it was not found. If there is no error, the
+	// decremented value is returned.
+	DecrementFloat64(k string, n float64) (float64, error)
+	// Decrement an item of type float32 or float64 by n. Returns an error if the
+	// item's value is not floating point, if it was not found, or if it is not
+	// possible to decrement it by n. Pass a negative number to decrement the
+	// value. To retrieve the decremented value, use one of the specialized methods,
+	// e.g. DecrementFloat64.
+	DecrementInt(k string, n int) (int, error)
+	// Decrement an item of type int, int8, int16, int32, int64, uintptr, uint,
+	// uint8, uint32, or uint64, float32 or float64 by n. Returns an error if the
+	// item's value is not an integer, if it was not found, or if it is not
+	// possible to decrement it by n. To retrieve the decremented value, use one
+	// of the specialized methods, e.g. DecrementInt64.
+	DecrementInt8(k string, n int8) (int8, error)
+	// Decrement an item of type int by n. Returns an error if the item's value is
+	// not an int, or if it was not found. If there is no error, the decremented
+	// value is returned.
+	DecrementInt16(k string, n int16) (int16, error)
+	// Decrement an item of type int32 by n. Returns an error if the item's value is
+	// not an int32, or if it was not found. If there is no error, the decremented
+	// value is returned.
+	DecrementInt32(k string, n int32) (int32, error)
+	// Decrement an item of type int64 by n. Returns an error if the item's value is
+	// not an int64, or if it was not found. If there is no error, the decremented
+	// value is returned.
+	DecrementInt64(k string, n int64) (int64, error)
+	// Decrement an item of type uint8 by n. Returns an error if the item's value is
+	// not an uint8, or if it was not found. If there is no error, the decremented
+	// value is returned.
+	DecrementUint(k string, n uint) (uint, error)
+	// Decrement an item of type uintptr by n. Returns an error if the item's value
+	// is not an uintptr, or if it was not found. If there is no error, the
+	// decremented value is returned.
+	DecrementUint8(k string, n uint8) (uint8, error)
+	// Decrement an item of type uint16 by n. Returns an error if the item's value
+	// is not an uint16, or if it was not found. If there is no error, the
+	// decremented value is returned.
+	DecrementUint16(k string, n uint16) (uint16, error)
+	// Decrement an item of type uint32 by n. Returns an error if the item's value
+	// is not an uint32, or if it was not found. If there is no error, the
+	// decremented value is returned.
+	DecrementUint32(k string, n uint32) (uint32, error)
+	// Decrement an item of type uint64 by n. Returns an error if the item's value
+	// is not an uint64, or if it was not found. If there is no error, the
+	// decremented value is returned.
+	DecrementUint64(k string, n uint64) (uint64, error)
+	// Decrement an item of type uint by n. Returns an error if the item's value is
+	// not an uint, or if it was not found. If there is no error, the decremented
+	// value is returned.
+	DecrementUintptr(k string, n uintptr) (uintptr, error)
+	// Delete all expired items from the cache.
+	DeleteExpired()
+	// Delete an item from the cache. Does nothing if the key is not in the cache.
+	Delete(k string)
+	// Delete all items from the cache.
+	Flush()
+	// Get an item from the cache. Returns the item or nil, and a bool indicating
+	// whether the key was found.
+	Get(k string) (interface{}, bool)
+	// GetWithExpiration returns an item and its expiration time from the cache.
+	// It returns the item or nil, the expiration time if one is set (if the item
+	// never expires a zero value for time.Time is returned), and a bool indicating
+	// whether the key was found.
+	GetWithExpiration(k string) (interface{}, time.Time, bool)
+	// Increment an item of type int32 by n. Returns an error if the item's value is
+	// not an int32, or if it was not found. If there is no error, the incremented
+	// value is returned.
+	Increment(k string, n int64) error
+	// Increment an item of type uint16 by n. Returns an error if the item's value
+	// is not an uint16, or if it was not found. If there is no error, the
+	// incremented value is returned.
+	IncrementFloat(k string, n float64) error
+	// Increment an item of type int16 by n. Returns an error if the item's value is
+	// not an int16, or if it was not found. If there is no error, the incremented
+	// value is returned.
+	IncrementFloat32(k string, n float32) (float32, error)
+	// Increment an item of type int64 by n. Returns an error if the item's value is
+	// not an int64, or if it was not found. If there is no error, the incremented
+	// value is returned.
+	IncrementFloat64(k string, n float64) (float64, error)
+	// Increment an item of type float32 or float64 by n. Returns an error if the
+	// item's value is not floating point, if it was not found, or if it is not
+	// possible to increment it by n. Pass a negative number to decrement the
+	// value. To retrieve the incremented value, use one of the specialized methods,
+	// e.g. IncrementFloat64.
+	IncrementInt(k string, n int) (int, error)
+	// Increment an item of type int, int8, int16, int32, int64, uintptr, uint,
+	// uint8, uint32, or uint64, float32 or float64 by n. Returns an error if the
+	// item's value is not an integer, if it was not found, or if it is not
+	// possible to increment it by n. To retrieve the incremented value, use one
+	// of the specialized methods, e.g. IncrementInt64.
+	IncrementInt8(k string, n int8) (int8, error)
+	// Increment an item of type int by n. Returns an error if the item's value is
+	// not an int, or if it was not found. If there is no error, the incremented
+	// value is returned.
+	IncrementInt16(k string, n int16) (int16, error)
+	// Increment an item of type float32 by n. Returns an error if the item's value
+	// is not an float32, or if it was not found. If there is no error, the
+	// incremented value is returned.
+	IncrementInt32(k string, n int32) (int32, error)
+	// Increment an item of type float64 by n. Returns an error if the item's value
+	// is not an float64, or if it was not found. If there is no error, the
+	// incremented value is returned.
+	IncrementInt64(k string, n int64) (int64, error)
+	// Increment an item of type int8 by n. Returns an error if the item's value is
+	// not an int8, or if it was not found. If there is no error, the incremented
+	// value is returned.
+	IncrementUint(k string, n uint) (uint, error)
+	// Increment an item of type uintptr by n. Returns an error if the item's value
+	// is not an uintptr, or if it was not found. If there is no error, the
+	// incremented value is returned.
+	IncrementUint8(k string, n uint8) (uint8, error)
+	// Increment an item of type uint by n. Returns an error if the item's value is
+	// not an ui// Increment an item of type float32 by n. Returns an error if the item's value
+	// is not an float32, or if it was not found. If there is no error, the
+	// incremented value is returned.nt, or if it was not found. If there is no error, the incremented
+	// value is returned.
+	IncrementUint16(k string, n uint16) (uint16, error)
+	// Increment an item of type uint32 by n. Returns an error if the item's value
+	// is not an uint32, or if it was not found. If there is no error, the
+	// incremented value is returned.
+	IncrementUint32(k string, n uint32) (uint32, error)
+	// Increment an item of type uint64 by n. Returns an error if the item's value
+	// is not an uint64, or if it was not found. If there is no error, the
+	// incremented value is returned.
+	IncrementUint64(k string, n uint64) (uint64, error)
+	// Increment an item of type uint8 by n. Returns an error if the item's value
+	// is not an uint8, or if it was not found. If there is no error, the
+	// incremented value is returned.
+	IncrementUintptr(k string, n uintptr) (uintptr, error)
+	// Returns the number of items in the cache. This may include items that have
+	// expired, but have not yet been cleaned up.
+	ItemCount() int
+	// Copies all unexpired items in the cache into a new map and returns it.
+	Items() map[string]Item
+	// Load and add cache items from the given filename, excluding any items with
+	// keys that already exist in the current cache.
+	//
+	// NOTE: This method is deprecated in favor of c.Items() and NewFrom() (see the
+	// documentation for NewFrom().)
+	LoadFile(fname string) error
+	// Add (Gob-serialized) cache items from an io.Reader, excluding any items with
+	// keys that already exist (and haven't expired) in the current cache.
+	//
+	// NOTE: This method is deprecated in favor of c.Items() and NewFrom() (see the
+	// documentation for NewFrom().)
+	Load(r io.Reader) error
+	// Sets an (optional) function that is called with the key and value when an
+	// item is evicted from the cache. (Including when it is deleted manually, but
+	// not when it is overwritten.) Set to nil to disable.
+	OnEvicted(f func(string, interface{}))
+	// Set a new value for the cache key only if it already exists, and the existing
+	// item hasn't expired. Returns an error otherwise.
+	Replace(k string, x interface{}, d time.Duration) error
+	// Save the cache's items to the given filename, creating the file if it
+	// doesn't exist, and overwriting it if it does.
+	//
+	// NOTE: This method is deprecated in favor of c.Items() and NewFrom() (see the
+	// documentation for NewFrom().)
+	SaveFile(fname string) error
+	// Write the cache's items (using Gob) to an io.Writer.
+	//
+	// NOTE: This method is deprecated in favor of c.Items() and NewFrom() (see the
+	// documentation for NewFrom().)
+	Save(w io.Writer) (err error)
+	// Add an item to the cache, replacing any existing item, using the default
+	// expiration.
+	SetDefault(k string, x interface{})
+	// Add an item to the cache, replacing any existing item. If the duration is 0
+	// (DefaultExpiration), the cache's default expiration time is used. If it is -1
+	// (NoExpiration), the item never expires.
+	Set(k string, x interface{}, d time.Duration)
+}