To anyone who has not yet accepted the natural functions of the female body, I'm sorry about your limitation, and proceed with caution, I'm talking about menstrual cups.
I cannot recommend them enough, they are so convenient. I use the Diva Cup, and am never turning back!
It's environmentally friendly, and I don't have to change the bathroom trash can twice during shark week.
It's frugal and pays for itself after two months of not buying an assortment of pads, tampons, and liners.
It's healthier! I can rest better (literally) knowing that I'm not going to get toxic shock syndrome if I forget to set my "wake up and take out your tampon so you don't die" alarm at 7am. Most cups are made of medical grade silicone, so your natural ph balance will not be compromised by chemically bleached treated and scented fibers. (Seriously, who ever thought THAT was a good idea?) Google 'tampon dangers' if you're brave enough.
There are a ton of resources online, check out the column on the right on this livejournal page, it can likely answer any question you could possibly have about menstrual cups. If I sound excited, I am! Seriously, it's a game changer. Try it, you'll like it.