The 250 ml is a popular size, especially as Zest-it is reusable and has a long active life, use it where you would have used turps or white spirit. 
Tip - It removes those 'sticky' labels that always leave a residue behind. 

You can use Zest-it it to thin oil paint, oil pastels and oil paint sticks or bars.
It leaves no residue so is ideal on paper for blending Coloured pencils and pastels.
It can be used for thinning or mixing with Wax for those who paint with wax or onto wax.
It is very popular with Parchment craft artists for blending and painting.
Mixed with oil paint it is excellent for staining wood either for Tole painting projects or picture frames.

Zest-it® Brush Cleaner and Oil paint dilutant
is a environmentally friendly, non-flammable, non-toxic, biodegradable,
alternative to 'turps' and white spirit. It's made from the zest of
citrus fruit for cleaning brushes and thinning paint with a pleasent citrus smell.

For more information about Zest-it visit www.zest-it.com/zest-it.htm
For 'health and safety' visit www.zest-it.com/zestitin.htm