Yay to free bubble teas More reasons to do your refuel at Esso. Get a free cup of Bober Tea when you refuel at selected Esso stations. You will get a stamp for every S$60 gross fuel spent (max 2 stamps per receipt) and you can start redeeming with 2 stamps! Choose from the Esso exclusive Berry CoCo Breeze, Grapefruit Green Tea or Signature Roasted Milk. Promotion valid at the following outlets: Esso Bukit Batok West – New! Esso Jalan