"The video, website, [and] my period starter kit, are very geared towards moms of tweens and teens," says Naama Bloom, founder of HelloFlo, launched in March, though she adds she has many 20-something customers as well.
Though she has seen increased interest since HelloFlo's ad went viral, Bloom says establishing her business wasn't entirely easy.
"I tried to raise money, but no one really wanted to talk to me about selling tampons," she says.
Still, many of the sites report strong customer growth, and they hope that they can change women's attitudes about their periods with the convenience they offer.
"Rather than it being a negative thing every month, as it has been forever and ever, we're trying to give women a positive experience.," says Le Parcel's Castleberry.