Amazon has the 2-Pack 10oz Bausch+Lomb Biotrue Multi-Purpose Contact Lens Solution for $16.49 - $6 off coupon (click "Extra off Coupon") - 5% off with Subscribe & Save (can cancel at any time) = $9.67 with free shipping on $35+ or with Prime.

Hydrates lenses by utilizing the same lubrican your eyes have naturally for up to 20 hours of moisture.