Amazon offers the Tide To Go Instant Stain Remover Liquid Pen 3-Pack for $3.12. Add it to your cart via Subscribe & Save to drop that to $2.96 with free shipping. That's a buck under our mention from a week ago and the lowest total price we've seen. (It's also about $3 less than you'd pay in a local store.)
Note: Be sure to cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments.