1. "It looks like you're feeling a bit thirsty. May I offer you something refreshing to drink? We have water, juice, or tea."
2. "I've noticed that you're not holding a drink. Can I get you something to quench your thirst? I'll gladly get it for you."
3. "Would you like something to drink? I can make you a cup of tea or coffee, or we also have some chilled beverages in the refrigerator."
4. "I've just made some fresh lemonade. It's perfect on a warm day like this. Would you care to join me for a glass?"
5. "I hope you're feeling comfortable. Is there anything I can do to make your stay more pleasant? Perhaps a cool drink would be nice. Can I get you a glass of water or a cold soda?"
Remember to customize your offer based on the visitor's preferences and what drinks you have available. Also, be sure to check if they have any dietary restrictions or allergies before offering specific beverages.