Woolies has the Waterdrop Recharge Grapefruit Electrolyte Drink (2.25g x 12 pack) for $8.50 today, marked down from $19.00, that's $10.50 off the regular price. Each tiny cube drops into 500ml of water and dissolves fast, giving you electrolytes, vitamins and zinc with no sugar and no mixing drama. At 71 cents a serve, it's a solid shout if you're chucking one in your water bottle before a walk, a gym session, or just trying to get through a long day without reaching for something with a heap of sugar in it. Stock levels on markdowns like this move quickly, so worth grabbing a pack if you're already doing a Woolies run.