100% silicone, BPA-free, Food-Grade material Material and temp range - Corrosion-resistant, odorless, soft yet non-deformable - Easy to clean; reusable - Safe from -60°F to 450°F Sizes and capacity - 4 stackable containers: - 8.66 x 3.34 in, 71 oz (2100 ml) - 7.9 x 2.76 in, 44 oz (1300 ml) - 6.9 x 2.17 in, 23.6 oz (700 ml) - 5.8 x 1.77 in, 20 oz (300 ml) - Four sizes stack for compact storage Purpose and design - Lids included in four colors: red, yellow, blue, green - Each container has a scale for precise measurement - Suitable for meal prep, dry food storage, refrigerator preservation, snack boxes, and fruit boxes - Inner surface is smooth; freezer safe; oven safe; can be sterilized in boiling water Function and practicality - Thick and flexible yet durable - Distinct colors help you stay organized and identify contents quickly - Liquid volume markers simplify meal planning - Mark contents with dry erase or chalk markers; erase with a wet tissue or warm water and soap