Menstrual Cup is probably the new best friend for ladies during their menstrual period.
It is a silicone cup that collects menstrual fluid. It does not react with your body and reduces pad rashes. You can leave it for up to 12 hours at a stretch, as its capacity is higher than pad's capacity, so you could continue to stay active as you usually do.
It is reusable & environmentally friendly, and you will need to replace the cup every 2-3 years.