In two weeks, Star Wars‘ decade-long“Skywalker saga” will end.

But Jedis can live the classic battle of light-versus-dark with Coca-Cola’s new lighted bottles.

Use the force to activate the glowing lightsaber on special-edition sugar-free Coke bottles.

The bottles come in two designs—Rey’s Ashla blue or Kylo Ren’s Bogan red. You’ll have to allot your energy-sword spending, though: Each wrapper lights up only about 500 times.

Run time also depends on storage and shipping, as well as other environmental factors, according to Mothership.

Don’t start saving your money just yet, though. There’s a catch. Well, many catches.

Only 8,000 of these limited-issue bottles are available for sale—and you’ll have to go to Singapore for one.

For the next three weekends, fans can participate in a “Galactic Hunt” for the plastic carafes, hidden in 45 secret locations across the Asian country.

At 10 p.m. the night before each activation, five puzzles will be released via Coca-Cola Singapore’s Facebook, Instagram, and official campaign pages. Answer each riddle to find the area of a gatekeeper doling out special passes.

Use that golden ticket to buy a lighted bottle at select 7-Eleven outlets by 9 p.m. on the same day.

The convenience store is also holding a “Full Force No Sugar” contest where participants can win Star Wars merchandise like drawstring bags, rolltop backpacks, lunch bags, and Royal Selangor R2-D2 pewter figures (worth $200).

Just pick up a 500ml bottle of Coca-Cola No Sugar from any 7-Eleven and present your proof of purchase online.