Eleven poison dart frogs have been raised by Gloucestershire experts in pint glasses of redbush tea.
Amphibian keepers at the Slimbridge Wetland Centre reared the amphibians from tadpoles in the brew to help keep them disease-free.
The caffeine-free African tea contains fungus-beating antioxidants, according to amphibian keeper Jay Redmond.
And it's working so well, some of the frogs are now being given this "medicine" on a daily basis.
BBC Points West's Fiona Lamdin has been to find out more.