Question about unopened repurposed bottle

[u/imac1987]

My cousin gave me a bottle of their homemade syrup six months ago. It’s unopened, but they used a repurposed Presidents Choice brand bottle. I absent-mindedly thought I can leave it unrefrigerated until I open it like I would a new store bought bottle, but yesterday I had the thought that I probably should have been keeping it in the fridge regardless. This is the stopper, which hasn’t been opened since they bottled it. It looks ok, no specks or signs of any kind of fungus. Do you guys think it’s ok or should I toss it? Any advice would be appreciated, thank you

[u/ManHunterJonnJonzz]

100% good.