How To Sleep At Work

This is eye sticker manufactured exclusively for those who are battling hard to stay awake in office and dare not to fall asleep in office. Now, sleepy workers or 'too overloaded" workers can enjoy of taking a nap with these eye stickers. Taking a nap is good! Regain your energy and refresh your brain. Source

Here is another type of stickers for safe nap;

Sleep Safe Tape is a roll of standard transparent 1/2" wide tape that has pictures of an eye printed along the length of the tape. Many situations exist where it is taboo to sleep despite the natural inclination of humans to rest their tired eyes. Examples include meetings, lectures, and conversations. Users can get the shut-eye they need while appearing to be wide-awake.

Do you think these are practical??