REI Garage offers the Outdoor Research 35 Liter Lightweight Stuff Sack in Ember for $14.73. Opt for in-store pickup to avoid the $5.99 shipping charge. Except for the mention below, that's the lowest price we could find by $5. It features a drawcord cinch closure.
Note: Amazon has it in Alloy or Lemongrass from $15.36 with free shipping for Prime members.
Of note, REI members can take an extra 20% off via coupon code "MEMLOVE20". Coupon expires April 10.