Review on AmazonCommercial Glass Measuring Cup Piece by Jen Johnson

These measuring cups should be commercial and dishwasher safe. Before the first use I put them in the dishwasher on a normal cycle without heat drying. When I opened the dishwasher, all four red marks on each measuring cup were gone. I've highlighted in yellow what's left of the red calipers in the second image. If you don't need a normal dishwasher, then definitely not a commercial dishwasher. This product is neither commercial nor dishwasher safe! Do not purchase this product if you use a dishwasher.