Final answer:
Mocha and skinny mocha syrup expiration largely depends on the manufacturer's guidelines and storage after opening, with an opened syrup usually lasting 3 to 6 months refrigerated.
Step-by-step explanation:
The expiration of mocha and skinny mocha syrup typically depends on the manufacturer's recommendations as well as how the syrup is stored after it is opened. For most syrups, there will be a 'best by' or 'expiration date' printed on the packaging.
Once opened, these syrups generally last for about 3 to 6 months when stored properly in a refrigerator. However, it's important to always check the product label for the specific shelf life and to inspect the syrup for any signs of spoilage, such as changes in texture, color, or smell, before use.