Liberals are sending care packages to female Democratic senators to oppose Supreme Court nominee Judge Brett Kavanaugh, including "pee-proof" underwear to use in their opposition to President Trump's court pick.

THINX and Icon, the companies behind the "period sex blanket" and absorbent underwear for bladder leaks, sent "endurance packages" to senators Elizabeth Warren (D., Mass.) and Kirsten Gillibrand (D., N.Y.).

"THINX and Icon create underwear that champion and support bodies throughout different stages of life," according to a press release sent by Unbendable Media, a public relations firm. "From first periods to post-menopause and all the little leaks in between, THINX and Icon aim to empower their customers with sustainable solutions, all while breaking taboos around menstruation and bladder leaks."

The companies said they were sending female Democratic senators urine absorbent underwear to "prepare them for hearings and other potential roadblock attempts in efforts to stop Kavanaugh's confirmation."

The underwear will help them "protect women's rights" by blocking Kavanaugh's appointment, according to the press release.

The "Endurance Packages" include one pair of Icon "moderate absorbency underwear," which holds between six and eight teaspoons of urine. A pair of Icon's Hi-Waist underwear retails for $39. The company explains how the product works: "Pee goes in. You feel dry. No leaks. No smell. Rinse. Repeat."

The care packages for Warren, 69, and Gillibrand, 51, also included a water bottle to "keep the senators hydrated" and a protein bar to "keep the senators nourished."

Icon said it is "absolutely critical" the senators wear the company's pee-proof underwear when opposing Kavanaugh late into the wee hours.

"It's unclear how long SCOTUS nominee Brett Kavanaugh's Senate confirmation hearing will last, but we know that it is absolutely critical for our Senators to do everything possible to prevent the appointment of a Supreme Court Justice who would roll back women's rights and undermine women's health," said Kejal Macdonald, Icon's vice president of marketing.

"That's why we're sending our absorbent, odor-free underwear to all of the women in the Senate, so that they can do everything possible to stop this nomination and protect our rights," Macdonald said.

"Icon and THINX believe in empowering every body, and that includes empowering women to make their own decisions about their reproductive health," said Icon and THINX CEO Maria Molland Selby.

Icon says its products are intended for women who experience bladder leaks, which the company pins at one third of American women.

"Launched in 2015 by the same team behind THINX's period-proof underwear products, Icon's innovative, absorbent underwear are soft, breathable and machine washable," according to the press release. "Every pair of Icon sold helps fund life-changing surgeries for women in developing countries."

THINX also sells "period blankets" for $369, or a "sex blanket for people with periods."

"No hot mess, no stress," the company says. "One side features our signature 4-layer tech to absorb fluids while you play, the other is crafted with plush satin (perf for cuddling) and features a v-inspired pattern in red stitching (low-key #periodpride)."

The period sex blankets are currently sold out.

Aside from period underwear and blankets, the company also sells a "Real Menstruating Human T-shirt" for $34.

THINX also publishes a feminist blog, with headlines such as, "The Great Barrier Queef: Diving Deep Into The Vagina Fart," "How to Make DIY Tampon Earrings," "Creating Space for Black Women to be Period-Proud," "I Don't Like Period Sex, Am I A Bad Feminist?" and "Period Reflections… with my Dad."