I cant say how much but Im sure there would be a breaking in period. I?m using for diamond painting & one bottle holds 5 small packets of diamonds, which is about 1,000. Get the right tools for the job, and it should work as advertised. When I first tried to waist trainer on I was a little shocked because it was my first time wearing a trainer and it was snug to say the least. These seem to fit weird and tight for supposedly being the same kind of slide, i figure they will stretch out with time but in the meantime i have to wear socks with them so i don?t get blisters ?? I had this product which I bought sometime 5-10 years ago and it worked great until I broke it. I absolutely LOVE this product! If you?re after proper noise cancellation, you?ll need to go for the Sennheiser HD450BT?s which have got ?NoiseGard? active noise cancelling and are about double the price. Bought these as a splash of color to wear with my bridesmaid dress, which was a "dusty blue" (greyish/blue) and everyone loved them! The portion shown on the picture was damaged upon opening.