(Image credit: Tom's Guide) Summer is just about to start. Heck, temperatures are already getting pretty high. It's the perfect time for a picnic, and if you need a hand keeping your snacks and drinks perfectly cool, you'll want to invest in one of the best coolers . I've even done the searching for you and compiled the best of the best deals below. If you're in a hurry, my #1 recommendation is the Ninja Frostvault Cooler on sale for $249 . This cooler is top of our list because of its fast cooling, compartments for easy organization and easy maintenance. Most importantly, it stayed cool for an incredible 8 days straight in our testing (and kept ice for 5 days.) Quick Links shop cooler deals at Amazon Igloo Marine Cooler 25qt: was $41 now $27 Igloo Marine Cooler 54qt: was $72 now $54 Coleman Classic Series Cooler 70qt: was $84 now $74 Stanley All Day Madeleine Backpack Soft Cooler: was $170 now $84 Ninja Backpack Cooler: was $199 now $149 Yeti Hopper M15 Portable Soft Cooler: was $300 now $199 Ninja…