Oh, sweet, sweet Diva Cup. I think that the Diva Cup is mainstream enough at this point that there is no explanation necessary, but if you really don't know, well...
I've been using the Diva Cup for about five years now, and besides its' many benefits (good for the environment, good for your body, good for travel, etc.) it's also super, duper cheap.
Let's analyze: (All these prices are from drugstore.com)
The Diva Cup goes for $39.99 and lasts your entire lifetime. (It's on sale right now for $29.99 here! )
One box of 40 Regular Tampax retails for $6.99.
One box of 60 Always Pantiliners retails for $3.99.
One box of 18 Kotex MaxiPads retails for $3.99.
So if your period lasts 5 days, let's say you need 4 tampons + 2 pantiliners + 1 pad per day. That's 20 tampons, 10 pantiliners and 5 pads per cycle. (And that's if everything goes according to plan. It doesn't. Am I right or am I right?)
So per cycle, you're spending $3.50 on tampons + $1.30 on pantiliners + $1.20 on pads. Each cycle costs approximately $6. According to these facts on menstruation, women, on average get their period 450 times in their lifetime. 450 x $6 = $2700. Ha! Versus... $40 for the Diva Cup.
So the big question is, what are you going to do with that hypothetical $2660?