diff --git a/make_post_sell/models/__init__.py b/make_post_sell/models/__init__.py
index 4abf079..4e84bdb 100644
--- a/make_post_sell/models/__init__.py
+++ b/make_post_sell/models/__init__.py
@@ -7,6 +7,7 @@ import zope.sqlalchemy
 # Base.metadata prior to any initialization routines.
 from .product import *
 from .shop import *
+from .shop_location import *
 from .user import *
 from .user_shop import *
 from .user_product import *
@@ -18,6 +19,7 @@ from .market import *
 from .coupon import *
 from .coupon_redemption import *
 from .invoice import *
+from .inventory import *
 
 from .stripe_user_shop import *
 
diff --git a/make_post_sell/models/inventory.py b/make_post_sell/models/inventory.py
index 737d994..430f274 100644
--- a/make_post_sell/models/inventory.py
+++ b/make_post_sell/models/inventory.py
@@ -13,8 +13,8 @@ class Inventory(RBase, Base):
     created_timestamp = Column(BigInteger, nullable=False)
     updated_timestamp = Column(BigInteger, nullable=False)
 
-    shop_location = relationship("ShopLocation", backref=backref("inventories", cascade="all, delete-orphan"))
-    product = relationship("Product", backref=backref("inventories", cascade="all, delete-orphan"))
+    shop_location = relationship("ShopLocation", uselist=False)
+    product = relationship("Product", uselist=False)
 
     def __init__(self, shop_location, product, quantity=0):
         if not product.is_physical:
diff --git a/make_post_sell/models/meta.py b/make_post_sell/models/meta.py
index c6cc878..7368a9e 100644
--- a/make_post_sell/models/meta.py
+++ b/make_post_sell/models/meta.py
@@ -16,7 +16,6 @@ UUIDType = TempUUIDType(binary=False)
 
 
 CLASS_TO_TABLE = {
-    "Address": "mps_address",
     "Shop": "mps_shop",
     "ShopLocation": "mps_shop_location",
     "Inventory": "mps_inventory",
diff --git a/make_post_sell/models/product.py b/make_post_sell/models/product.py
index 773de89..3339c2e 100644
--- a/make_post_sell/models/product.py
+++ b/make_post_sell/models/product.py
@@ -104,6 +104,12 @@ class Product(RBase, Base):
     # this value should be treated as immutable after object creation.
     is_sellable = Column(Boolean, default=False, nullable=False)
 
+    # this value should be treated as immutable after object creation.
+    is_physical = Column(Boolean, default=False, nullable=False)
+
+    # Add relationship to inventories
+    inventories = relationship("Inventory", lazy="dynamic", back_populates="product")
+
     # lazy="joined" performs a left join to reduce queries, it's magic.
     # set uselist=False creates one-to-one relationship.
     shop = relationship(argument="Shop", uselist=False, lazy="joined")
@@ -121,13 +127,6 @@ class Product(RBase, Base):
         "product_users", "user", creator=lambda u: UserProduct(user=u)
     )
 
-    """
-    _users = relationship(UserProduct, order_by=[UserProduct.created_timestamp.desc()])
-    users = association_proxy(
-        "_users", "user", creator=lambda u: UserProduct(user=u)
-    )
-    """
-
     file_keys = [
         "product",
         "preview",
@@ -241,6 +240,12 @@ class Product(RBase, Base):
         """return slug from title"""
         return slugify(self.title)
 
+    @property
+    def total_inventory_quantity(self):
+        if not self.is_physical:
+            return None
+        return sum(inventory.quantity for inventory in self.inventories)
+
     @property
     def s3_path(self):
         """return the S3 path shop.id/product.id"""
diff --git a/make_post_sell/models/shop.py b/make_post_sell/models/shop.py
index 7c8a4fd..856f28b 100644
--- a/make_post_sell/models/shop.py
+++ b/make_post_sell/models/shop.py
@@ -99,6 +99,10 @@ class Shop(RBase, Base):
         order_by="desc(Coupon.created_timestamp)",
     )
 
+    # lazy='dynamic' returns a query object instead of collection.
+    # Reference: http://docs.sqlalchemy.org/en/latest/orm/collections.html
+    shop_locations = relationship(argument="ShopLocation", lazy="dynamic", back_populates="shop")
+
     # lazy='dynamic' returns a query object instead of collection.
     # Reference: http://docs.sqlalchemy.org/en/latest/orm/collections.html
     search_requests = relationship(
diff --git a/make_post_sell/models/shop_location.py b/make_post_sell/models/shop_location.py
index 4885af8..03d03bf 100644
--- a/make_post_sell/models/shop_location.py
+++ b/make_post_sell/models/shop_location.py
@@ -16,7 +16,7 @@ class ShopLocation(RBase, Base):
     postal_code = Column(Unicode(16), nullable=False)
     created_timestamp = Column(BigInteger, nullable=False)
 
-    shop = relationship("Shop", backref=backref("shop_locations", cascade="all, delete-orphan"))
+    shop = relationship("Shop", uselist=False)
 
     def __init__(self, shop, name, address, city, state, country, postal_code):
         self.id = uuid.uuid1()
diff --git a/make_post_sell/scripts/alembic/versions/cc6211ec360e_physical_products_shop_locations_and_.py b/make_post_sell/scripts/alembic/versions/cc6211ec360e_physical_products_shop_locations_and_.py
new file mode 100644
index 0000000..2ebe126
--- /dev/null
+++ b/make_post_sell/scripts/alembic/versions/cc6211ec360e_physical_products_shop_locations_and_.py
@@ -0,0 +1,61 @@
+"""physical products shop_locations and inventory
+
+Revision ID: cc6211ec360e
+Revises: 7217f39a20a8
+Create Date: 2024-06-08 09:40:24.200194
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'cc6211ec360e'
+down_revision = '7217f39a20a8'
+branch_labels = None
+depends_on = None
+
+from make_post_sell.models.meta import UUIDType
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('mps_shop_location',
+    sa.Column('id', UUIDType, nullable=False),
+    sa.Column('shop_id', UUIDType, nullable=False),
+    sa.Column('name', sa.Unicode(length=64), nullable=False),
+    sa.Column('address', sa.Unicode(length=256), nullable=False),
+    sa.Column('city', sa.Unicode(length=64), nullable=False),
+    sa.Column('state', sa.Unicode(length=64), nullable=False),
+    sa.Column('country', sa.Unicode(length=64), nullable=False),
+    sa.Column('postal_code', sa.Unicode(length=16), nullable=False),
+    sa.Column('created_timestamp', sa.BigInteger(), nullable=False),
+    sa.ForeignKeyConstraint(['shop_id'], ['mps_shop.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_mps_shop_location_id'), 'mps_shop_location', ['id'], unique=False)
+    op.create_table('mps_inventory',
+    sa.Column('id', UUIDType, nullable=False),
+    sa.Column('shop_location_id', UUIDType, nullable=False),
+    sa.Column('product_id', UUIDType, nullable=False),
+    sa.Column('quantity', sa.Integer(), nullable=False),
+    sa.Column('created_timestamp', sa.BigInteger(), nullable=False),
+    sa.Column('updated_timestamp', sa.BigInteger(), nullable=False),
+    sa.ForeignKeyConstraint(['product_id'], ['mps_product.id'], ),
+    sa.ForeignKeyConstraint(['shop_location_id'], ['mps_shop_location.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_mps_inventory_id'), 'mps_inventory', ['id'], unique=False)
+
+    op.add_column('mps_product', sa.Column('is_physical', sa.Boolean(), nullable=False, server_default=sa.false()))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('mps_product', 'is_physical')
+    op.drop_index(op.f('ix_mps_inventory_id'), table_name='mps_inventory')
+    op.drop_table('mps_inventory')
+    op.drop_index(op.f('ix_mps_shop_location_id'), table_name='mps_shop_location')
+    op.drop_table('mps_shop_location')
+    # ### end Alembic commands ###