The best alternatives to SunnySide are The French Lunchbox, Silbo, and /Lunchbox. If these 3 options don't work for you, we've listed a few more alternatives below.
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Silbo will change what you know about lunchtime. It keeps your meal fresh and cold all day and with the touch of the button heats it up to your desired temperature in a minute. It's dishwasher friendly and will empower you to think about what's going in your body, so you can optimise your health.
Heatbox: The self heating lunchbox Warm and healthy food anywhere, Anytime. Heatbox is a self heating lunchbox that provides a healthy alternative to microwaving, by heating food through a steaming system nutrients stay locked in.
With its two-tiered food compartments and its high-quality materials, this lunch box follows its user everywhere! Designed to make our life easier, it is microwave, dishwasher and freezer-safe. The hardest part is to choose one favorite color!