Recipe:

preheat oven 350f, 180c, gas mark 4.

 For Cake:

 1: in a saucepan, mix Coca Cola, oil, butter and cocoa and bring to a boil.

 2: in a bowl add sugar and sieve plain flour, baking soda and mix with a spoon.

 3: in a bowl mix eggs, butter milk, vanilla and beat.

 4: pour the boiled Cola mixture into the flour mixture and mix well on medium low speed.

 5: then add the egg mixture and beat till combined.

 6: grease and flour the 13" x 9" oven dish.

 7: pour the batter and bake for 30 to 35 minutes, or till checked with a tooth pick comes out clean (may take longer).

 8: once baked leave to cool, then cut in 1 to 2 inches slices & freeze for 30 minutes.

 For Making Chocolate Bottle:

 1: remove label keep aside.

 2: using a sharp knife or scissors, careful slice and remove a segment of plastic from the bottle.

 3: melt chocolate on a double boiler.

 4: coat the inside of the bottle with 2-3 layers of chocolate. Allow to harden in between each layer, keep in the freezer.

 5: beat cream and powder sugar till thickened.

 6: once chocolate has hardened, coat inside with cream, place the sliced cake and cream , continue till the bottle is full.

 7: fill the opening with melted chocolate and keep in the freezer for 10 minutes.

 8: then remove cake from the plastic, use a sharp knife to slice and remove it carefully by segments.

 9: to reattach the label and lid, I glue it on with melted chocolate.

 10: serve cake when desired. Store in the fridge. Cake is best consumed within 2-3 days.