Review on Pieces Sublimation Transfer Sleeves Tumblers by Elvis Bragg

I really wanted to like this product. The amount for the price didn't seem bad. However, the packaging is melting. I tried several times with heat settings below 350 and it still melted. I've tried at 325, 300 and 250 with the same result of film melting in less than 3 minutes. I have issued sublimation blanks at different sizes and temperatures by trial and error to get the same melting of the foil.