do buzzballz really go bad after 2 weeks of opening?

got 2 of the big ones, both were opened and some taken from them but they’ve been refrigerated the whole time, don’t really want them to go to waste and im not chugging the rest. packaging says consume within 2 weeks of opening which i did not realize when we opened both, but how long are they still actually okay for, again staying refrigerated. it’s a strawberry rita and a berry cherry if that makes any difference. recently turned 21 so very new stuff to me