The Engel 30L premium soft cooler is in a league of it own with welded seams that prevent hot air getting in and water getting out, it holds 48 x 375ml cans and can keep them cold for days. Built tough to withstand knocks and punctures and includes an integrated bottle opener. Suck the excess air out with a vacuum using the vacumm valve before first use to optimize the performance of this awesome cooler.