Pullman Putrajaya Lakeside Hotel is a beautiful facility with well-appointed rooms and almost all the amenities you'd need. Unfortunately, the hotel is located practically in the middle of nowhere and there isn't that much to do in Putrajaya.
If you're looking for something cold to drink after hours, your best bet is to order from room service or the one restaurant that stays open 24 hours on site. The convenience store near the hotel lobby doesn't even have a refrigerator for cold sodas. The only places to buy alcohol are the lobby bar and the same 24 hour restaurant.
On the plus side, Pullman Putrajaya is near the manmade Putrajaya Lake. Wide sidewalks and pathways around the lake and hotel make it easy to take a pleasant stroll. You can even rent bicycles from the hotel to ride to the one shopping mall in town or the Putra Mosque.