Peda of milk is available in grocery stores and restaurants. They have different shelf life depending on the store and the type of packing. Generally, it keeps for 6-8 hours under hot temperature or 2-3 hours at room temperature in the refrigerator. As soon as it goes out of refrigerator, heat breaks down protein and fat particles within them. You may experience some separation into two layers as a result if you keep them around for more than 10 days, however do not worry because this happens with all food stuffs that are left on counter top for a long period of time after opening the package or container; just simply rinse off any layer that has separated and eat as usual.