I bought this with the Mira - Skin thinking I would only get the Mira - Skin device (I didn’t check the contents of what I would be getting) but I already have a smaller gel. Anyway, this gel is really good! I use it with the hyaluronic serum and it really allows the ultrasound to work it’s best with the skin. It shows dry if you’re not generous enough so it’s best to do certain parts of the face at a time as you go. It not only conducts the the device with the skin but it holds in the moisture with the hyaluronic serum and your products afterwards. It’s a big glass bottle (glass because they think plastic eroded into the product or something) but I agree, it’s less chemicals and a lot prettier too actually - you can tell they put a lot of thought into what they do and sell.