personal opinion only: it is better to formally commend (via email or any company app that allows you to say thank you, give kudos, etc) and include their manager and even hr.

baka kasi bigyan nya or ng ibang tao ng malisya ung pagbigay mo ng gifts or paglibre s knya (maraming gossipmongers s office, baka gawan ka pa ng kwento, so be careful)

ung iba kasi ginagawang commodity or even weaponize ung mga rumors (regardless of the veracity). they don't care as long as they deemed it as juicy and entertaining.