This set is completely BPA-free and has a patented valve system that allows you to easily remove excess air, so growth of naturally occurring bacteria is greatly reduced, and food stays fresh longer. Simply press down on the center of the lid and air is forced out through the one-way valve. The instant vacuum freshness is created without pumps, motors or confusing parts. The patented valve system is also designed to automatically release air pressure when it builds up in the microwave, so you never have to worry about spills and splatters. The stain-resistant and shatter-proof containers feature a handy date dial that allows you to record when food was first stored in the refrigerator.

Details:

• Green and clear
• 4 pieces
• Nestable
• BPA-free
  
• Stain resistant
• Shatter proof
• Features a date dial
• Patented valve system