I'm sure I've gotten many good gifts but one gift I appreciate time and time again is my CamelBak. It's a water reservoir for when I go on hikes or long bike rides. It is really heavy on my back at first when it's full but when it's hot outside and I'm 2 miles into my walk I really enjoy having the cool water to sip from. Since the water is contained in the pack it stays cool even when it's really hot outside. Have you tried one of those?