Intriguing piece, indeed. The Hubba Bubba soda was a limited run, quite a rarity these days. If unopened and kept in proper storage conditions, it might even increase in value. If you're a true enthusiast, I'd recommend getting it insured - that can means business.
Actually, the sparkling water hype would've been the perfect time to reintroduce Rocky Mountain. People love trying any kind of new fizz right now. I bet it had a more intense carbonation compared to what's on the market today. What I wouldn't give to have those back for a taste …