These cups are made out of industrial grade silicone and have dividers that hold the resin separate until poured. There are 4 different cups that have different number of sections.
Below is more information on each cup:
Each cup is 3.75" in diameter at the bottom, 4.375" in diameter at the top and 4.75" tall.
2 section (purple) - 28 fl/oz total, about 790 grams of resin
3 section (pink) - 27 fl/oz total, about 763 grams of resin
4 section (green) - 26 fl/oz total, about 735 grams of resin
5 section (orange) - 24 fl/oz total, about 678 grams of resin
Those numbers are to the top of the dividers and we do not reccomend filling it that full since you run the risk of mixing resin before you pour them.
Mold release sprays are not required but will extend the life of the cup.
After pouring your resin just let the cup sit and the resin to cure then gently roll the cup to loosen the resin and pull the cured resin out of each compartment.
The sleeve is 3d printed out of a hard plastic so it won't flex when you grab it. When done pouring you can pull the used silicone cup out and put in a clean silicone cup so you only need one sleeve for all your cups. The sleeves are being printed from different colors of plastic so the one you receive might be a different color than what is in the picture.
Please contact us if you are unhappy with the product.