This four-bin set combines two 15-liter and two 20-liter airtight containers so you can size storage to whatever you're keeping fresh, from a small bag of flour to a large sack of rice or kibble. The 15-liter bins hold up to 26 pounds of rice or 13 pounds of pet food, while the 20-liter bins hold up to 35 pounds of rice or 17 pounds of pet food, depending on the density of what's inside. Each bin uses a double silicone seal, a damp-proof box, and secure latches to keep out moisture and pests, and all four are molded from BPA-free, food-grade PP that wipes clean easily. Detachable wheels let you roll a full bin instead of hauling it, the bins stack vertically to save pantry space, and the flat tops hold seasoning bottles or small jars. Four measuring cups are included, one for each bin, so scooping rice, pet food, or grain stays mess-free.