Water Bottle

My latest way to get off is to insert my cock into a water bottle. I first collapse the bottle then slid my cock into the opening. I push it down as far as I can then create a vacum on my groin. This pulls my cock up inside of the bottle. It makes for a great sensation. I just keep doing that for a while then I start to fuck the bottle. By then my cock is so hard and it is just covered with pre cum. I keep pumping the bottle up and down my cock until I just explode. I have to wait a bit to take it out since the head is totally swollen by this point.