Stasher silicone bags help save the planet from piles of plastic waste, and your backpack from failed zipper strips and their squished-out sandwich mustard. Pliable and space-saving like a Ziploc, but reusable and microwave- / dishwasher-safe like Tupperware, Stasher bags are an alternative to snack-packing that don't seem to require a lot of sacrifices to support their environmentally-friendly nature.
Made of platinum food-grade silicone, Stashers have an air-tight, pinch-press seal for locking food in, and air out to keep it fresh and tidy. You can use them to store leftovers in the freezer as well as the fridge, and you don't have to transfer that last serving of spaghetti carbonara to another dish before reheating it in the microwave. Dirty Stashers can go into the dishwashers for use over and over again.
The bags come in 4-1/2" square and 7" rectangular sizes, and several different colors and designs. You can also use them to store other personal items, such as makeup, small tools and pieces of hardware, and your toenail collection.