SMELL PROOF BAGS WITH FREE ROLLING TRAY: simply useable sealing strip, keeps water, moisture, dust and other unwated stuff out and odor inside. Save your effort, keep things organized and clean. MATERIAL AND COLOR: Our baggies are made of holographic quality film and shiny metalized film with transparent front for displaying the product. Tray is made of metal in black color, both of them are reusable and safe for your use. MULTIPURPOSE USE: Perfect for dispensary packaging, good accessory for home, school and office use, can be used for candy, coffee beans, dried flowers, baking, dried fruits, cookie, tea, nuts and so on, also holds cosmetic like lipgloss, soap, etc. MEASURES TRUE TO ADVERTISED SIZE: Our ziplock bags are available in size 3x4" and come with a free rolling tray in size 7.1x5.5".