How do passion fruits look like?

The fruit are round and hard when ripe and are usually purple*, when split open, there are hundreds of little seeds that look and feel like tadpole eggs... The juice comes from the little jelly like sacks around the eggs. You can eat then as is, or use in cooking or as you've discovered, yummy juice drinks. There's not much juice in a single passion fruit, but it's strong, and is usually diluted for drinks.