20L Sierra Designs Grotto Cooler Pack (Grey/Black/Blue) $40 + Free S&H

Field Supply has 20L Sierra Designs Grotto Cooler Pack (Grey/Black/Blue) on sale for $119.99 - $80 off when you apply coupon code SDG20 in cart = $39.99. Shipping is free. Features: 20L insulated cooler backpack holds up to 28 cans (without ice)