Eisco Labs Bottle Rocket Launching Platform - Launches 2L Soda Bottles Over 100ft Into The Air

Love how easy it was to use the rubber stopper worked great.

Overall my family enjoyed launching 2liter bottles into the air, but I do have two small issues. First, only a small washer prevents the spring (which puts pressure on the rubber stopper) from going through the bottom. Occasionally the washer slips through and you are unable to have any pressure in the 2 liter bottle (all the water squirts out, took me a bit to figure out what was happening). Second, the spring isn't strong enough to put much pressure in the bottle. I ended up threading the hose through a 1/4 inch thick piece of plastic on the bottom of the assemble which allowed more pressure and prevented the washer from squirting through. On the plus side, I never had the base fall over (seemed reasonably stable). As I stated earlier, the family loves it. I took it to a church outing and they loved it. Just wished it had slightly better engineering

Too small for 2 liter bottles

The media could not be loaded. I received the rocket on time me and the kids have lots of fun with it it goes a hundred feet in the air and I emailed the company and they assured me that they have fixed the washer problem overall it is a great fun toy must haves for young kids or physics teacher

Worked well

Did not shoot bottles very well. Often spit out plug prematurely.

It was okay, or maybe I expected too much from this!

Great for Physics class. Spring tension on the rubber stopper can be manipulated to increase the let-off pressure (starts to let off around 40 psi). Still at 40 psi to 50 psi had great flights. We removed the top-ring to allow for fin design and it worked great.