When you end up with a coleman cooler as your humidor, don't waste the extra $$ at the cigar shops buying the premixed bottles of humidifying solution. First go to the florist and buy a block of that green foam they use to hold the flowers in place in the baskets or whatever (about $2.00) - Second, go to your local drugstore and buy a quart of Propylene Glycol ($6.00-$8.00 at most) - Third, go buy a gallon jug of distilled water from your local grocery store. Mix the PG & distilled water in equal parts (50/50), place the green block in a an open plastic tupperware container that your wife won't notice missing, cut/drill holes all over the lid, pour your 50/50 humidifying solution over the green brick until fully saturated (best if done in the container), remove excess (unabsorbed liquid), place lid on tupperware and place it in your cooler with your cigars. Splurge that $15.00 for a digital hygrometer and add water as needed to keep the humidity at 70%.