Really good size container with an A+ seal on the lid. You can hear the air being pushed out when you wedge the lid into position, then snap it closed in a 2 part closure. The lid locks pop up to let air vent out during microwaving, but I have not tried microwaving it yet. I have put it through the dishwasher (top rack only) and it did great. I think the retail price for one of these containers is kind of pricey, for plastic, but if the price was for 2 containers that would be more acceptable.