Berlinzo Premium Clear Ice Cube Maker Molds - 4 Large 2.1" Crystal Clear Ice Squares for Whiskey & Cocktails - Easy Removable Ice Cube Molds - Storage Bag & Silicone Insert (Non-Electric)

tl;dr: This unit makes excellent clear ice with low effort. It helps to know the science behind it to avoid pitfalls. It's worth the slightly higher price for the build quality. I couldn't be happier with the huge clear ice cubes it makes for my whiskey drinks. Basic science behind clear ice: As ice crystals form, contaminates are pushed away. Normal ice trays freeze from all directions so contaminates end up in the middle of the cube, making them cloudy. By surrounding the mold on 5 sides with insulation, the water directionally freezes (top-down in this case) leaving a cube of ice that has pushed all contaminates into the water below the mold. Stopping the freezing process before the reservoir of water freezes aids in mold removal. Fit and finish: I chose this model because it has a hard outer shell with dense insulation molded to an exact fit. Other models use that cheap layered white foam with no shell. Inside of the molded insulation is fitted the reservoir, which again is a high quality plastic and fits perfectly inside the insulation shell. Finally, the molds are a thick silicone that has a high-quality feel. 10 out of 10 for fit and finish. Functionality: Each cube has FOUR holes to push contaminates through verses only 1 in other models I looked at. It is easy to fill, easy to insert the molds, and just a pleasure to use. You will need freezer space for it, making clear ice takes space. Removing the molds can be frustrating. Be patient, follow instructions and let the thing sit for 10-15 minutes prior to attempting removal. Alternate sides, go slow and they eventually break free. It is easier if the freezing process is halted before the reservoir has frozen, but this takes trial and error to dial in. My freezer's optimum time ended up being 27 hours. After use, I found that I was able to simply pour the reservoir water out, then pull the thin bit of ice that did form straight out and restart the process immediately. Leave it too long in the freezer and you'll have blocks of ice to deal with. Tips: Fill the reservoir with WARM water up to the point the bottom of the molds will sit. Then insert the molds and fill with COLD water. After filling, tip slightly from side to side to allow any trapped air to escape. This will aid in the preventing reservoir from freezing too easily. Ice heaves happen. Sometimes as ice forms/expands, it pushes up. So some cubes may be larger than others. It's still clear and cool.

Works very well but still a lot of effort to make clear ice. Not as simple as the description says. Lots of manipulation to get the ice out the mold.

I’ve never written a review in my life but I’m so impressed with this product I had to say something. Simply, this thing makes perfectly clear crisp square ice cubes. I read a lot of people complain, complaining that it’s hard to get the ice out of the mold, etc. etc. But if you just give it five minutes out of the freezer, everything comes apart super easily. I used to make ice in a shallow cooler and then cut it, but could never get it Perfectly square. This totally works and I highly recommend it. 10/10

Tried different ways to get crystal clear cubes for ricks glasses and nothing worked until I used this ice maker. The cubes are crystal clear perfection. Its compact and easy to use. Be sure to read the instructions first.

yes it is clear ice, a little hard to get out after frozen