**Sour Blue Raspberry (CAP) 4% (2-7-23)** -- Wow, the room note on this one, was full on BLUE !!!! Nearing the end of this big ass series, I finally got to spend some time with this one, and I was glad I did. It presented as a fairly artificial [Blue Raspberry](https://www.thespruceeats.com/what-is-blue-raspberry-is-it-a-real-flavor-4771767), which in and of itself is hard to explain, as they don't occur in nature. Some people think the BRB is a pairing of Raspberries and Blueberries, which MIGHT be true, but it's hard to 100% nail that down. Regardless, it WAS true to the traditional profile, with a nice sour tartness, with JUST enough sweetener to round it out. @ 4% it felt like it might be able to go a little higher, maybe even 5.0-5.5% as a solo flavor, but even at my testing weight, there were no off-notes. Like a previous flavor above, this one had a recognizable commercial" taste/ room note that is used widely, and you'll know what I mean when you taste it. No cooling, which was a bonus for me, as I can't use them, BUT, you could chill it down if needed. Regardless of how ICEE came up WITH the blue raspberry, this flavor did really capture it well. Non fatiguing, and still mysterious as to what exactly WAS in it, this one stayed interesting, and fresh throughout. If you DO like the Blue (hehe, it's actually a clear flavor), you'll love this one. While I still may not be able to 100% fully identify the "berry" compounds in this one, it had no real faults, and did what it was supposed to do. Solidly placing this one @ **9.0/10**."