Rizla Flavour Infusion Cards Rizla Infusion cards have been developed as a response to the menthol ban coming in May 2020. You simply insert a flavour card into a packet of cigarettes or rolling tobacco and wait for 60 minutes for the flavours to infuse into your smoke of choice. For a more intense flavour leave for a little longer. The Rizla Flavour Infusions range of flavour cards offers two different variants – Menthol Chill which provides a stronger, more intense flavour and Fresh Mint which is slightly smoother and more mellow.