· LEAKPROOF DOUBLE-LOCK CLOSURE: Each (re)zip provides an airtight seal that actually clicks when sealed, making them durable, completely leakproof and freezer-safe. Remarkably convenient for preportioned smoothie packs, meal prep, and food storage.· INCLUDES: (5) Stand-Up Quart Bags. Prep your fruit in daily portions and simply throw them into the blender when you're ready. Whether you're starting your day with a nutritious boost or refreshing with an afternoon pick-me-up, our leak-proof and airtight seal ensures your blends stay perfectly preserved. Blend, store, and enjoy – it's smoothie time, made simple!· EASY TO CLEAN - Handwash is recommended for best results. Add a drop of dish soap with water to your bag. Seal it up and shake it around. Rinse thoroughly. (re)zips are top-rack dishwasher safe on a standard setting. Note: not for use in the microwave, sous vide, or in high heat. Make sure all hot foods have cooled before storing.· THE ECO FRIENDLY CHOICE: Made from 100% BPA-free, lead-free, phthalate-free, and FDA food-grade PEVA, one (re)zip replaces up to hundreds of disposable baggies.· SEAL CARE: Periodically wipe a thin coat of olive oil along closure grooves to keep them closing smoothly. This will ensure the longevity of your double-lock closure.