I presented more things which can be made with old shampoo bottles, I find the plastic bottle sponge holder also handy :)
Links:
Plastic Bottle Sponge Holder (How To: Sponge Holder from a Shampoo Bottle)
via: Using an old shampoo bottle to make a holder for sponges at the kitchen sink
Here at unikatissima:
Entries containing the word ‘shampoo’