Last time we had a new winner again - it was 
Time for Day 17 and a new challenge.
The letter of the day is
Q.
Yes, I know many of you didn't even know that a brand starting with a letter Q existed, but there is one. I challenge you to name it!
Once again, I'll reveal the source after the correct guess.
Hint 1: A Chinese manufacturer.
Hint 2: Brand name is a made-up word.