I recieved a sample of this from Lush many moon ago and it's still going strong to day! That could be because I don't use it all that often but when I do - watch out!
I'm not sure how it comes usually, but for me it came in a plastic tub, which I've since repotted. It's a pale gold color and reminds me of jelly. I haven't noticed any smell with mine, but I could just be used to the tea tree smell.
To apply, I use a cotton bud and dip it into the jelly. It's slightly more hygienic than using my finger, and that way I don't have to touch the pimple either. I swab the gel onto the pimples and leave it to dry - I usually do it just before bed so I don't end up touching it! I don't know if I would repurchase, I'd probably just buy straight tea tree, but it's really nice and while I have it I'll enjoy it.
This was kind of disappointing to be completely honest as I expected it to have fast, visible results (especially since Lush products are usually amazing!). The presence of natural ingredients is a great bonus however, in truth, there's not much point if the product itself doesn't work very well. It has a kind of jelly/gel consistency and I applied it to any red angry pimples I had. They may have faded a teensy bit faster than usual? But I wouldn't really justify purchasing this again.