Amazon has the 0.45oz Silka Max Strength Antifungal Liquid with Brush Applicator on sale for $6.49 - 5% off with Subscribe & Save (can cancel at any time) = $6.17 with free shipping on $25+ or with Prime.

Helps relieve itching, cracking, burning, redness, soreness, irritation and discomfort from athlete's foot and ringworm.