Amazon has the 0.33oz Anbesol Maximum Strength Oral Pain Relief Gel on sale for $6.29 - 20% off (check “Save an extra” box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel at any time) = $4.72 with free shipping on $35+ or with Prime.

20% Benzocaine, provides instant pain relief for toothaches, canker sores, sore gums, denture pain, etc.