When I saw the charger one, I immediately ran to my room and got a spring. Tip for how to put it on: use your hands to unwind it half way so that it looks wavy and they form it around the wire/charger. Incase anyone was wondering how tf do i out this thin shit on? well there ya go. -gisselle
You fill the rest of the bottle with tap water and then you have icy cold water all day, without the struggle of fitting ice blocks into a regular bottle!
But I can totally vouch for the wet paper towel one, I've snap-chilled a dozen Red Bulls with that little gem.
http://f00.inventorspot.com/images/wall-mountable-toothpaste-squeezer-01.jpg