Amazon has the 20-ct Robitussin Long-Acting CoughGels Non-Drowsy Adult Cough Suppressent Liqui-Gels for $5.64 - 5% off with Subscribe & Save (can cancel anytime) - 35% off coupon (check “Save an extra” box, eligible on first S&S order for this product) = $3.38 with free shipping on $35+ or with Prime.