Heinz may have the smallest, but when it comes to portability and functionality the Wavebox has it beat as the best microwave. Yes, it’s a portable microwave, but it also comes with a cooler bag that fits snugly inside making it to double as a cooler so you can keep your foods fresh all day long before you lay some nuclear power into them. There’s no battery powered operation so the Wavebox has to be connected to one of three power sources: a regular wall outlet, car battery (jumper like cables included) or cigarette lighter. As for cooking times there are three presets and it’s available in four different colors to the tune of just over $200. Just like Cuisinart CMW-100 – Best Small Countertop Microwave, Wavebox portable microwave is one small microwave packed with great features perfect for your kitchen.