Buy Grape Stomper Dank Vapes. Order Grape Stomper Dank Vapes Online. Grape stomper – Dank vapes: Also called “Sour Grapes,” Grape stomper – Dank vapes, is a craft hybrid strain created by Gage Green Seeds. A complex cross between Purple Elephant and Chemdawg Sour Diesel, Grape stomper – Dank vapes has quite the pedigree. Slightly sativa-dominant, the effects of this strain are felt most in the head. In true hybrid form, however, a pleasant tingly-body sensation usually appears after a few minutes.