封签 meaning in English

facing slip (邮件的)

We broke the seal on the new aspirin bottle
我们撕掉了阿斯匹林瓶上的封签。
It was put forward that packaging appearance and structure should be combined together to form a artistic entirety , including packaging shape , painting , colors , brand , and so on , to facilitate selling of commodity
力求包装外观与结构的设计，在科学合理的基础上加以修饰和美化，使包装造型、装贴、画面、色彩、商标、封签、吊牌等构成一个艺术整体，以促进商品的销售。