Glass

Glass, is a light blue block in color and the weakest material that the pigs use for their structures. Among the three kinds of blocks, this one can be easily broken by all kind of birds. Levels with these blocks are often provided with The Blues, as they are very good at breaking these blocks. It is suggested to multiply the Blues in front of the glass block to maintain the greatest strength of the bird. Most birds slow down when they hit glass, but Chuck slows down after only breaking one block of glass.

A weaker type of Glass can be seen in some levels of Piggy Farm and other. Just like Glass it is very fragile. Glass breaker birds can break this type of glass. It's mainly used in the structures as windows or protectors and difficult the access for blocks or pigs a bit. They come in various colors but are mostly teal.

In Angry Birds Stella, Luca is the go-to bird for glass- his Soundwave Shock shatters all blocks in its path of that type.

Ice
Ice, a light blue-colored block, is in certain Angry Birds titles the weakest building material alongside or in place of glass. Like glass, the Blues deal high damage to ice. Over the many slingshot games, there have been birds or power-ups with the ability to turn blocks of other types into ice, including Ice Bird in Angry Birds Space, Carbonite Han Solo in Angry Birds Star Wars II, and the Freeze Spell in Angry Birds 2.

Tips

 * The Blues are very helpful on destroying glass, especially when "shotgunning" or better, when split.

Trivia

 * Strangely, Chuck is weak against glass, despite glass having a much weaker strength than wood & stone.
 * This possibly applies to stronger birds except for Mighty Eagle, Mighty Dragon, and Space Eagles.
 * Despite the game achievement referring to ice and the Mattel board game being called "Angry Birds: On Thin Ice," Rovio has revealed, via Twitter that the material is meant to be glass.
 * The Angry Birds 2 – Meet The Blues: Cool With Ice! trailer and description suggests that, in Angry Birds 2, the material is ice, not glass.
 * In Angry Birds Space, the light blue material is called "glass", while the light blue material with icicles is called "ice".
 * The material is darker in Angry Birds Trilogy.
 * In Angry Birds Star Wars, there is some iron inside the glass blocks.

Gallery
For gallery, see Glass/Gallery