I have several Isi products and like them all so I knew I would not be disappointed with these. In addition to the normal duties of measuring cups, they are microwave safe and can also be used with hot liquids. They are sturdy yet very flexible so are great for pouring things into my kitchenaid mixer while it's running without using the pour shield. Also, I can pour my hot pan drippings in one to prepare my liquid for making gravy and it will pour without dripping into my pan because you can squeeze the top together as much as needed to pour. They are also plenty big enough to fit a hand blender in. Great versatile product.

LOVE these....bought 2 sets....great for measuring and for general kitchen use: use the big one as a small pitcher when mixing up powdered drinks and pancake batter, etc. Can store stuff in the fridge in them (wouldn't covers for these be great?) and do a million other things...very handy and non-breakable to boot!

I have the saucer shaped hummingbird feeders and was using a 1 qt glass measuring cup to fill them and never seem to be able to fill them, without spilling sugar water on the counter, so I went online and searched for a spill-proof measuring cup and found these. From the first time using them, I didn't spill a drop of sugar water on the counter. I also checked to see if they measured accurately and they were spot on, the mfg has updated the measurements on the outside of the containers (doesn't look like the picture that's posted for this product). The ounce measurements are on one side of the container, which includes 1/4, 1/3, 1/2, 2/3... cup increments on the 1 & 2 cup measuring cups, and the metric measurements are on the other side, all clearly marked on the outside of the containers and easy to read.