Interesting looking bottle. Is that molded text up near the lid? If there was a better shot (BD?), it might be easier to identify as it looks like one of those protein powder bottles.
If you have seen the R4 DVD of this film, you can also add a Pizza Hut logo and still be "screen accurate". All except one of Taco Bell logos (which can be seen on a door) had been replaced with Pizza Hutt for the R4 DVD release. Why Warner did this is anyone's guess as the previous VHS release had Taco Bell. The dialogue was also changed (with ADR) and no longer made sense in reference to spicy food being illegal.
I would suggest hitting http://www.grainger.com and doing a search. They carry hundreds of bottles. Plastic, glass, you name it, and I would not doubt they would have some kind of lab bottle like this. It looks a lot like lab bottle I used to design graphics for. I think Dynalon was the company.