Reusing amber bottles

I'm ordering quite a lot of chemistry recently and I have a lot of these small 25 ml amber bottles that I kept in order I'll need them, but didn't find a good use so far because the new chemistry is coming in new bottles. Do you keep those bottles, and if so, what do you do with them?

If you don't need them recycle bin.

They can be used to break down developer into small completely full bottles for longer term storage rather than one large partially full bottle. They can store small bits and pieces of anything that might otherwise get overlooked and lost. They might store small doses of medicines or cooking supplies. Certainly keep a few of them for whatever use you might need them for in the unforeseen future.

I find I use the 25ml size the least of all the sizes I own, but I use them to break down larger quantities of chemistry resulting in completely full bottles for longer storage (as Jim Jones said above.)

What products come in 25ml (glass?) bottles?
The smallest I see is maybe 125ml, and more often 187ml.

Small bottles are perfect for re fill in small quantities developer. As example I buy 500 mL FX39 film developer. Take my 10 x 50 mL bottles and fill them . So I get for long time (up to 2 -3 years) each time a fresh new bottle developer. This is impossible if you take each time 50 mL out of the 500 mL Flask.
50 ml Stock and 1:9 dilution makes 500ml working strength, very useful for 120 film. I think 25 mL (in reality that's is most of the time 30 mL if you fill to the top of the flask) is I think more useful for 35mm film.

You can also store small volumes of exactly prepared stock solutions of single chemicals. From there you can do further dilution steps.

Those are just the right size for Rodinal/Parodinal concentrate if you're using 1+24 dilution for 120 or 2x135 in a Paterson tank (2x135 requires about 600 ml). The only problem is the concentrate may lose its "lasts forever" quality if you don't get one or more of the crystals from the bottom of the original bottle into each of these small bottles -- and Rodinal derivatives are probably the least in need of this kind of preservation technique of anything...