Review (1/5): Waste of money.
The adhesive silicone stickers are so attached to the tray that is so hard to handle them. I tried the Double Side Adhesive Eyelid Sticker but I didn't like it. Having your eyelid glued is uncomfortable and feels strange. The glue is not that strong and when you sweat it gets loose and the eyelid falls back to its original place, so you have to check in the mirror often...