You can always squeeze another dollop out of the toothpaste tube, but once you realize you’re out of contact solution, you’re either sacrificing a perfectly good pair or contacts, or making a grumpy, late night trip to the store. But if you buy this two-pack of ReNu contact solution for just $8 on Amazon, you won’t have to worry about this scenario for a long time. Just be sure to clip the $5 coupon and use Subscribe & Save to get the deal.