LOVE 'em. Bought SIX. Use 'em every day.
(Reviewing the LARGE size Sistema Mug- 30.4 ounces, although they look alike, they come in several sizes. Check to be sure you are getting the size you want before ordering.)
I absolutely LOVE these mugs.
Bought a blue one first to take soup to work for lunch. However, found myself using it at home too - for soup, chili, and to store leftovers in the fridge. I have reheated mac and cheese and casseroles as well. Works also for hot or cold beverages. Lots of room for a big beverage AND ice cubes. I have made milkshakes it them. Uses are endless.
Snap on lid is great. NO, you can't put liquid in it and turn it upside down and expect it not to leak. I use the lid if storing in fridge or for travel. Just keep it right side up and no problems. I take the lid off in the microwave and use a venting plastic dome type cover just because I don't want to unsnap the lid while it is filled with hot liquid. No brainer. Yes you could unsnap the lid and open the vent and lay the lid on top of the mug in the microwave, but my way seems easier to me.
Caution: Anything with tomato in it will stain, so DO NOT BOIL anything in them, just heat gently. Boiling/high heat can damage the plastic according to the manufacturer. Even heating gently, I did get a very SLIGHT red stain in my blue one even though I didn't boil in it, but after using and washing a couple of times, it is now gone!
I liked the blue one so much, I bought one in orange, purple, green, pink and red for an even half dozen. Now when I make homemade soup or stew, I can put it in the mugs and I have lunch and or dinner for days. Meal in a mug! (Not sure about freezing in them) I try to use the red, pink, and orange one for tomato based foods.
It holds almost a quart, so you can easily make a big bowl of soup without filling it to the top. That and the big handle make it easy to carry from microwave to table without the lid, even a room away. Just don’t trip! Or put the lid on while carrying. Doesn't get hot like a ceramic soup bowl. Handle stays cool and is easy for small hands and big hands alike.
The plastic is almost self-cleaning. Nothing liquid based seems to stick to it, especially liquid soups. Washing is just a formality! LOL.
Negative reviews seem to me to be largely from individuals who didn’t take the time to read the instructions or who are reviewing their particular seller. Not quite fair. One review I read started out with “You would assume . . .” Seriously?
I am fussy, and I highly recommend these mugs. However, I read the instructions before using. Shop around; the prices vary quite a bit. I bought mine on two different websites from several different sellers in order to get the best prices.
Verified purchase: YesCondition: New