Vodka Cocktail

Any ideas for a refreshing cocktail of vodka to enjoy at the pool this weekend?
My boyfriend and I are going to Las Vegas this weekend and we bringing a handle of Ketel One vodka for the room. This handle should be enough to survive the weekend cuz obviously not in the room all the time. This is just what we drink in the room and to try to reduce the number of $ 14 to buy drinks in bars or pool. Obviously I'm bringing tonic club soda, and Red Bull for a cocktail before going out at night. I wonder if anyone has any thoughts on the vodka-based drinks would be good for the day. I would like it was as simple as possible, preferably with no other major liquor, but the vodka. I do not want to buy a whole bottle of something else to make these drinks. Although drinks with just a touch of Chambord or something like that would be fine, because I'll just buy the small aircraft. I am looking for something delicious and refreshing that would be a pain to do in a small hotel room or a pain to fit in a cooler.
I love the mix 7up, acid, and vodka or 151. In a tall glass with ice.
Herb’s Vodka Cocktail Shakeoff