BE AMAZING TOYS-Geyser Tube. Learn how to trigger an enormous geyser by dropping Mentos chew mints into a bottle of soda! This package contains one 6-1/2 inch geyser tube and one package of Mentos. 2- Liter soda bottle not included. Recommended for ages 8 and up. WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 years. Conforms to ASTM F963. Imported.