It looks and acts like regular ice but if you step too forcefully or jump on it,

The sugar glass is crafted using the glucose Minecraft Maps cauldron. Place it on top of a cooking furnace and boil some drinking water in it. Place a block of glucose in it and after a couple of seconds it will turn into 16 pieces of sugar glass. Use that to build glass and/or colored panes and place appropriately.

The wine glass will break if fired at with any projectile. Unfortunately this destroys the block completely but that's just the idea of the mod.
And a glass will also break from slipping through it. So you can now recreate a dramatic skylight access by jumping down through the ceiling.
Thin ice is also something to be concerned about if you face it.
Read more  Zombie Sunscreen Mod  at minecraftio.com/zombie-sunscreen-mod/