Vacuum Preservation Set - 4 Glass Containers and Pump. PEBBLY - Vacuum Preservation Set (4 Glass Containers + 1 Pump). This set includes 4 borosilicate glass containers (460 ml to 1900 ml) and a vacuum pump rechargeable via USB-C. Thanks to vacuum sealing, food stays fresh longer. Stackable, these containers optimize storage. Heat-resistant, they are microwave, oven (without lid), and freezer safe. The airtight transparent lids allow you to see the contents at a glance. Composition: borosilicate glass, silicone, plastic. Care: hand wash or dishwasher safe. Set of 4 + 1 pump.