The link directs to a page offering a free sample of DripDrop Hydration Relief. DripDrop is a brand that produces hydration products, such as oral rehydration solutions. Users interested in claiming the free sample may need to follow specific instructions provided on the page, such as filling out a form or completing certain tasks. However, as an AI, I can't access the specific details of the offer or verify its legitimacy. 

Physician-developed formula: DripDrop Zero was created by a physician to provide a superior dehydration aid without sugar. With the precise levels of sodium electrolytes needed to draw fluids into the bloodstream faster and more effectively than water alone. And unlike other electrolyte drink mixes, it tastes great.