The lids feature a one-handed design: Simply press the button down to form an airtight seal. Now, the lids are slimmer, easier to clean and dishwasher safe. Some also store accessories, like the pictured half-cup scoops that lives inside the container so you always have a dedicated one on-hand for measuring dry goods. This Baking Set is designed to perfectly fit a five-pound bag of flour and sugar, as well as a one-pound box of brown sugar. The POP containers come in an assortment of sets and sizes so you can buy exactly what you need. They stack neatly and securely, allowing you to easily keep track of necessary refills.