The Plastic Squeeze Gorilla Bottles I use to fill tanks I get from ebay.
The 120ML Glass Bottles I use for post mixing, steeping and storage I usually order from:
The shipping is a little high but they are high quality containers. They don't smell funny like they have been used previously for essential oils or something. That can happen buying glass bottles from ebay, you have no idea what has been in them. I had to soak a batch of glass I got from ebay a while back in a bowl of cheep beer over night to get a perfume stink off of them and then boil them.