They could be anything. They are not "water like" they are "liquid" - not the same thing. It does look like an ampoule containing some sort of drug or pharma type substance. Beyond that, it could be anything. Are there no markings at all?

Hi M, they look a lot like chemical anchors that I have used many years ago, but without the packaging I can't be sure, but if you had that...... Good luck anyway.

Agree with johnmc. I think they may be epoxy resin for use with rawlbolt type fixings DNW

Without any information it is impossible to establish what they are. DO NOT OPEN THEM UP. They look like ampoules but it is not clear what they contain. As the glass is orange it could be ampoules of drugs. But is could also be a solution of vitamin A! Can you find out who sent it out? If you do, explain to them in words of one syllable where they have gone wrong. This a bane of my life. People leave unlabelled items about and expect someone else to clear them up. If you cannot get a sensible response treat it as very hazardous and get it disposed of as that (Toxic etc). It will cost but trying to open up tubes and trying to get analysed is not a good idea. There are some substances that are very hazardous (could be radioactive even) and it is possible (based on the limited facts you have given us) that it is one of those.

They may not take them without you identifying the contents and assigning the correct EWC code. I don't think there is a code for don't know. Sorry Chris

I was going to say resin too - so not much help. In view of the "dead end" you seem to be going down, have you thought of contacting any glass manufacturers - may be able to tell you something along the lines of we make something similiar for "X" who fill it with "Y".

If you send one of them to a lab to analyse then you only have 3 left! Just find 3 other labs. Job done Sorry could not resist. But to get rid of it you will have to find out what it is. If you can find out who put it in the bin, you may find out where the clear out was from and you never know the box or other packaging may still be around or even a label on the door to the cupboard. All you have to do is get someone to own up. Chris

Could they be air sampling chemicals? They are similar to older hand pump testing vials. No markings which is unusual so maybe not. From you groups and area you're not that far from portion down, chemical analysis may be available through them - but it would cost.