Truth be told, mixed reviews on these.
We've had ours forever and we love them - We use them as pencil stands on our desks - one sharp pencil, always at the ready.
But here's the deal - Sometimes kids underestimate their own strength. If you use your Hulk-hands to tighten the caps, they'll weaken over time, and crack.
You'd think it was the glass that would break. NOPE, it's the plastic.
That said, we still recommend them, just not for really strong children.
The glass portion is quite durable - we've never had one break as a result of being knocked off a desk or dropped (knock wood).
Offering a choice of colors, because color isn't always a fun surprise. BUT, we don't have photography yet... you can look up the colors online, or imagine the green is dark and foresty, and the red is deep and moody. We'll get on the photography though...
H 2.1" x W 1.3" x L 2.3"