The best way to store pizza to maintain its flavour and texture is to first let it cool to room temperature. Once cooled, place the slices into an airtight container, separating each slice with some parchment paper to prevent sticking. For short term storage, keep them in the fridge where they will stay fresh for up to a week. If you need to store them for a longer time period, you can even freeze the slices making them last for up to 2 months. The best way to freeze them is to individually wrap the sliced in cling film or tin foil, then place them in a resealable freezer bag. When ready to reheat them, you can reheat them directly from the freezer by placing them in the oven at 190°C until fully heated through.
The best way to reheat single slices of pizza is in a frying pan. Preheat the frying pan, then, once hot, add the pizza. After a minute or two, add a small splash of water and cover with a lid. This method ensures the base of the pizza stays crisp while the top steams.