Transit with duty-free liquor at Changi?

[ADucVR]

I'm taking SQ25 from JFK to SIN and then connect to HAN next week. It's my plan to buy some duty-free whiskeys at FRA (since I'm not sure I'll have time in SIN and I didn't see type of liquor I want to buy in Changi).
So anyone knows if I will have any problem with duty-free liquor bought in FRA when I go through security checking at SIN?
Thanks!

[SQ218]

Check the Changi faq in the Shopping at Changi section point 8.

[ADucVR]

Thank you so much!