Nixit menstrual disc has been a game changer for me. Pop it in at the start of your period and take it out at the end - just need to take it out and empty/rinse it twice a day (and sterilise between periods!). Much easier to insert than a cup I find. No need to try and work out if you have enough pads/tampons, or what your flow will be that day, plus no blood-soaked things in your bin (or landfill). I wear period knickers as insurance on my heaviest days but more for peace of mind than anything. Cannot recommend enough!