Place 1 pound (about 450 grams) gummy bears in a shallow mixing bowl or dish in a single layer.

Pour 750 ml vodka or rum into a measuring cup or jigger.

Add 1/4 cup fruit juice concentrate, grenadine, or schnapps to the liqueur and stir to combine.

Slowly pour the liqueur mixture over the gummy bears, ensuring each piece is coated.

Stir gently with a spoon to distribute the liquid evenly without breaking the bears.

Transfer the mixture to an airtight container, cover, and refrigerate for at least 4 hours.

After 4 hours, test one gummy bear for desired infusion and texture, refrigerating up to overnight if needed.

Divide the infused gummy bears and any liquid into shot glasses, filling each about two-thirds full.