I feel your pain maddy! My cat has the same obsession with glasses/cups, other than his own in it's proper place. This OCD actually comes in handy when they are older. I couldn't get my cat to drink enough water to help with constipation problems till I started placing cups of water in out-of-the-way places other than next to his food bowl.

I wish you well in your current dilemma! Looks like Sharni found some pretty decent suggestions!

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Minds are like parachutes. They only work when they are open.

~Thomas Dewar~