The recent deal ( ) was popular, so here’s another one if you want to spend a bit less money.
Right on Philips’ page, you can get a coupon for $10 off a package of two, bringing the total to $15 for 2, shipping and tax included.
https://www.usa.philips
(There’s also a periodic pop-up for 15% off, after submitting the form. Not sure if it stacks.)