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Amazon [amazon.com] has 6-Pack 6-Oz Colgate Cavity Protection Toothpaste 3 for $29.94 – $10.02 (multibuy discount) – 5% when you check out via Subscribe & Save = $18.42.
Shipping is free with Prime or on $35+ orders.

Savings
Save $10.02 on 3 select item(s) (check and activate [amazon.com])