diff --git a/sigl/database/orm.py b/sigl/database/orm.py
index e4e5c0e..927c6ea 100644
--- a/sigl/database/orm.py
+++ b/sigl/database/orm.py
@@ -46,6 +46,10 @@ def init_orm():
 
     # # List Entries
     db.mapper(ListEntry, list_entries, properties={
+        'product': db.relationship(
+            Product,
+            back_populates='entries'
+        ),
         'shoppingList': db.relationship(
             ShoppingList,
             back_populates='entries',
@@ -54,6 +58,11 @@ def init_orm():
 
     # Products
     db.mapper(Product, products, properties={
+        'entries': db.relationship(
+            ListEntry,
+            back_populates='product',
+            cascade='all, delete-orphan',
+        ),
         'locations': db.relationship(
             ProductLocation,
             back_populates='product',
diff --git a/sigl/domain/models/accessKey.py b/sigl/domain/models/accessKey.py
index 0b5fcc0..90a8cce 100644
--- a/sigl/domain/models/accessKey.py
+++ b/sigl/domain/models/accessKey.py
@@ -4,8 +4,9 @@ Simple Grocery List (Sigl) | sigl.app
 Copyright (c) 2022 Asymworks, LLC.  All Rights Reserved.
 """
 
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 from datetime import datetime
+from typing import List
 
 __all__ = ('AccessKey', 'AccessToken')
 
@@ -24,6 +25,8 @@ class AccessKey:
     may also be used for throttling.
     """
     key: str = None
+
+    # Client Information
     clientId: str = None
     clientIP: str = None
     userAgent: str = None
@@ -38,8 +41,8 @@ class AccessKey:
     revokedAt: datetime = None
     restoredAt: datetime = None
 
-    # Populated by ORM
-    # tokens: List['AccessToken'] = None
+    # Relationship Fields
+    tokens: List['AccessToken'] = field(default_factory=list)
 
 
 @dataclass
@@ -56,7 +59,11 @@ class AccessToken:
     User Agent string are logged for future auditing purposes.
     """
     token: str = None
+
+    # Relationship Fields
     accessKey: 'AccessKey' = None
+
+    # Client Information
     clientIP: str = None
     userAgent: str = None
 
diff --git a/sigl/domain/models/list.py b/sigl/domain/models/list.py
index e796016..f07a0d6 100644
--- a/sigl/domain/models/list.py
+++ b/sigl/domain/models/list.py
@@ -4,8 +4,10 @@ Simple Grocery List (Sigl) | sigl.app
 Copyright (c) 2022 Asymworks, LLC.  All Rights Reserved.
 """
 
-from dataclasses import dataclass
+from dataclasses import dataclass, field
+from typing import List
 
+from .accessKey import AccessKey
 from .mixins import NotesMixin, TimestampMixin
 from .product import Product
 
@@ -25,8 +27,8 @@ class ListEntry(NotesMixin, TimestampMixin):
     deleted: bool = False
 
     # Relationship Fields
-    shoppingList: 'ShoppingList' = None
     product: Product = None
+    shoppingList: 'ShoppingList' = None
 
 
 @dataclass
@@ -36,8 +38,8 @@ class ShoppingList(NotesMixin, TimestampMixin):
     Contains a collection of `ListEntry` items which are intended to be
     purchased.
     """
-    accessKey: str = None
+    accessKey: AccessKey = None
     name: str = None
 
-    # Populated by ORM
-    # entries: List[ListEntry] = None
+    # Relationship Fields
+    entries: List[ListEntry] = field(default_factory=list)
diff --git a/sigl/domain/models/product.py b/sigl/domain/models/product.py
index 8c050fe..2d0cc67 100644
--- a/sigl/domain/models/product.py
+++ b/sigl/domain/models/product.py
@@ -4,10 +4,15 @@ Simple Grocery List (Sigl) | sigl.app
 Copyright (c) 2022 Asymworks, LLC.  All Rights Reserved.
 """
 
-from dataclasses import dataclass
+from dataclasses import dataclass, field
+from typing import List, TYPE_CHECKING
 
+from .accessKey import AccessKey
 from .mixins import NotesMixin, TimestampMixin
 
+if TYPE_CHECKING:
+    from .list import ListEntry
+
 __all__ = ('Product', 'ProductLocation')
 
 
@@ -23,11 +28,11 @@ class Product(NotesMixin, TimestampMixin):
     category: str = None
 
     # Access Control
-    accessKey: str = None
+    accessKey: AccessKey = None
 
-    # Populated by ORM
-    # locations: List['ProductLocation'] = []
-    # shoppingLists: List['ShoppingList'] = []
+    # Relationship Fields
+    entries: List['ListEntry'] = field(default_factory=list)
+    locations: List['ProductLocation'] = field(default_factory=list)
 
 
 @dataclass