You can use anything for a hide, there are some that you can purchase for $10-$15 or you can get a $2 plastic container turn it over and cut a hole in it. Doesn't matter, it's not exactly rocket science, I have a freind who uses shoe boxes. Here is my cage, there are 6 hides in it (I have two snakes in it).

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Tosha 
1.1.0 Ball Python (Harry and Fluffy)
0.1.0 Siberian Husky (Kita)
0.2.0 Feline (Pippen and Pandora)
0.0.1 Dessert Tortoise (Pope)
5.4.2 Fish (1,2,3,4...)
0.0.1 Frog rescued from pool skimmer
0.0.2 Lizards rescued from pool skimmer