Silica dessicant is not poisonous.

You still shouldn't eat it though, it's extremely absorbent and cause bowel obstructions by drying out part of your guts and getting stuff stuck.

EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT EAT IT

It says "Do not eat," so it should be perfectly safe to drink! uwu