Flashing blue LED ice cubes?
 

Anyone know of any common chain stores that sell flashing blue LED ice
cubes? I first saw them at the SciFi Diner restaurant at MGM Studios
in Disneyworld Orlando. Thought they were the neatest thing.

If I have to get them online, that's fine, but I'd rather pick them up
somewhere locally. Don't know how special of an item these are for
mixed drinks (had a tasty blue margarita with one of these in them).

Thanks.