Smiling pop-top cover / cup cap

Pop-top is a common container for drinks.
It can be purchased at many places such as convenient stores.

However, pop-top cans are not the same as bottles which can be tightened and be brought easily.
Once you pull the tab, you have to drink it up as soon as possible to prevent it spoiled or flat.
If you use this pop-top cover, you can avoid all the problems above.
Besides, the smile face can keep you feeling delighted all day.