Add some lime juice to the shrimp, toss to coat, and set aside
Mix the water and tequila and set aside
In a large saucepan, melt the butter with the oil and, when foamy, add the onion, shallot, garlic, and chipotle pepper and sauté until soft, 2-4 minutes.
Add the tequila/water and cook for 5-10 minutes until reduced.
Add the shrimp and cook for 3-5 minutes until opaque and cooked through.
Remove from heat. Drain if still too soupy. Toss with the cilantro. Season with salt and pepper to taste.
Serve as an appetizer or over rice.