Venom bottle - ZAWA-Evolved/ZAWA GitHub Wiki
Venom bottles can be obtained by farming venomous animals such as the scorpion and tarantula. Right click on these animals with an empty bottle to milk them of their venom, but be careful; these animals are dangerous!
The cooldown for obtaining venom from these animals is a full Minecraft day, 24000 ticks or 20 real life minutes.