Quoting RainbowDash:" Depending on your flow, you can go up to 8 hours without removing it to empty it (the Diva Cup, that ... [snip!] ... flow as it's happening, so there's no backup of blood like there tends to be with tampons when they get completely saturated. "
Also I don't feel like it's backup that leaks when I change them out, but more a bunch dripping because it sits up against my cervix. If that makes any sense. Because basically, instead of a bell shaped thing, it's a silicone band with a hefty bag hanging from it. Lmao.