Although my skill is not good, I think the double eyelid tape did make my hidden eyelid became double eyelid effect...
Actually 3M tape is quite useful if we can manage to cut the eyelid shapes properly.. but I always spend alot of time cutting evenly as it is hard to cut out two identical shapes from the tape... but one good thing about 3M tape it is cheap and it has a translucent clear texture, without any holes making it not so obvious. (More natural looking I should say!)
I bought this 3M tape with holder around $3.50 at one of the beauty toiletries shops at Ang Mo Kio ( saw them at Toa Payoh too) ... normally I will replenish my 3M beauty tape at Guardian, and they cost less than $3 per roll, without the holder. With the holder, I don't have to worry that the rims will get stick with dirt and dust. ( But can also keep inside a small ziplock bag if you do not have the holder.)
3M Blenderm beauty tape is definitely one of my favourite double eyelid stickers!
Update 29 Aug 2011: Picture taken at Guardian Store [3M Tapes sold at Guardian are the same as the ones sold at SASA, just that they do not come with the packaging (boxes)]
Next time I will take pictures of the after effect of using pre-cut double eyelid tapes.