Woot offers Philips One by Sonicare 2pk Brush Heads, Coral, BH1022/01 for $3.99 (orig. $9.99) + free shipping with Prime.

Product Description:
Philips one by Sonicare brush head are designed for the Philips One battery toothbrush, an ultra-portable electric toothbrush that keeps your smile bright. Always be ready to touch up your smile, no matter where the day takes you.
 

• Micro vibrations and tapered bristles polish teeth for a brighter smile
• Brush heads match colorful handle for super sleek look
• 2 minute timer with 30 second notifications
• Compatible only with Philips one by Sonicare handles