Drink coconut

Drink coconuts are young coconuts where the coco water has not yet developped a lot into coco flesh. Their shell is still relative soft. They are sold in their white fibre mantle, cut easier transport. They are an important source of liquid in tropical countries. Their water tastes delicious.

Where to get it in Dublin
They sometimes can be found in Asian shops, most likely in the fridge shelf. A good place might be the Asian supermarket.