An empty bottle can often be quite a nuisance. It’s essentially a useless, hollow, bulky and heavy container that holds nothing, but occupies space in your bag. Space that could be used to carry other valuable stuff. While this isn’t an incredibly burdening problem, it’s an annoyance and an inconvenience that man could do without, so we can focus on the real issues (like global warming, or relocating to Mars); and that’s where the Space Shaker helps us. It takes our minds off