My (sugarless) Bazooka gum lost its flavor approximately 2.5 hours ago -- yet I'm still chewing it.
Remember the bubblegum that came with Topps baseball cards? I loved that stuff. Hard as a roof tile, chalky as hell, but somehow delicious. It also would get wax all over it from the wrapper, which may or may not have added to the flavor. Unfortunately I'm told they no longer package the cards with gum like this any more. Those were the days...
Coincidentally, I've found that Bazooka gum is made by Topps. So there you have it. The next best thing I suppose.