Volcano Design to go with the classic classroom chemistry experiment- the inside is slightly larger than the opening to give slight resistance to the foam escaping. the sides are sculpted to have three deep lava “flows” for a cool visual effect. 

We tested ours and rinsed it clean with warm soapy water without issue.

Prints in one piece, no supports necessary. 

Filament color used in photo- Panchroma Starlight Jupiter PLA