Incidents happen when you’re not careful enough with your fuzzy drink and straw. Everybody knows it. It’s best to avoid them anyway – water is much healthier and it doesn’t leave any stains in case you spill it.
If you can’t help it and the damage is already done, try to absorb as much of the spillage as you can, using a dry cloth. If you spilled on your clothes, wash them as usual. If the stain is on the carpet or the upholstery, treat the area with a suitable shampoo.
In every case, always read the manufacturer instructions if there are any, before you do anything. Then proceed with a small test patch. If any doubt, consult a professional cleaner.