Empty 1 gal. milk jugs. (Washed out well.) They're easy to obtain and cheap.
Reuse them a few times and, when they get messy, toss them in the recycle bin and get new.
If you are using distilled water from the grocery store, it often comes in 1 gal. plastic jugs.
Plastic soda bottles. 1 liter and 2 liter.
Again, you have a practically inexhaustible supply!
Is there a shop that sells beer and wine making supplies near you?
They often sell 1 gallon glass jugs with screw-on tops.
There's a beer making shop called "Bierhaus International" right around the corner from my house.
The last time I went there to get bottles he said, "You're the photography guy, aren't you?"
Like the others say, if your bottles are clear or translucent, keep them in the dark.
Put them in the cupboard under the sink and you'll be fine. All you need to do is minimize the light that gets to them.