Space Invaders Hot Water Bottle Warmer :-: One thing I love about researching all things retro, is the diversity of items that exist...but let me tell you there are some strange items...and this is one of them. This is basically a sock for your hot water bottle with and excellent Space Invader motif. Why is it strange...well, who on earth in this day and age still uses hot water bottles!!! Yes I'm certain to be surprised. But anyhow...this is still a nice looking item.