Disclosure: I received this product in exchange for my honest unbiased opinion.
Honestly I can say I found that depending on the liquid the glow was lessened. If you put a can or a Mikes hard black cherry lemonade in it, you get some glow but not the same as say a light beer. That being said I will forgo the two above in order to have my beer or water be visible and stay cold when I am at an outside bonfire or fishing. I like that it has variable lighting pattens as it makes it unique in this niche market as well as the uniqueness of a light dancing bottle. When in a large group it can also help to signify exactly which drink is yours by having each one on a different pattern. I like that it works as well as any other Koozie in keeping the drink cold longer and reducing the amount of heat transfer from my hand as well as keeping my hand from getting cold.
I like that the Koozie came with an additional sleeve for thinner bottles and a flashlight bonus as well. It was nice to have both freebies to join the koozie and match somewhat.