Where would I find empty flip top paint bottles?

[Condottiere]

Where would I find empty flip top paint bottles - 18ml or more? I found one eBay UK seller and he's offering 20 x 20ml for £7.55, but £12.30 shipping to the USA. I bought Khorne Red base color and will be mixing it with gesso as a primer for my Khorne warriors, so thought I'd pre-mix a batch...

[Wirelizard]

Industrial plastics places often have small bottles in various sizes and openings. Check for plastics suppliers in your area.

Our local one happens to be called Industrial Plastics & Paints and stocks a whole range of bottles and other things of interest to wargamers and model makers, like bulk sheets of foamed PVC and styrene plastic.

[Jagannath]

I've got a muji locally and use the PU range that is made for decanting cosmetics... not super cheap but they work a charm.