I have a vintage caddyo hand cooler when slim cans didn't exist and it still works perfectly. The plastic solution holder is white in colour and more transparent than the opaque blue that is now used in the iCube Wrapsulator. I believe these are the can and bottle holders that money can buy. They are not cheap but you get what you pay for and these holders are amazing and keep your drinks cold until the last drop. They can also be used consecutively for a few drinks in a row before there is a requirement to put it back in the freezer. they are also aestetically pleasing and very comfortable to hold when taking a drink. Ideally it would be perfect to own a few of each design, then you could exchange for a fresh one every couple of hours. This is my goal but I'm retired on a tight budget so we will see. In summary this is a wonderful high quality product that you will not reget buying if you like your drinks to remain ice cold once they've been opened! "The best".