Glass Spray Bottles (Amber or Clear)

Link to Purchase in USA: Amazon.com (2 Pack, Sally's Organics- the brand I use) (6 Pack, Sally's Organics) (6 Pack, cheaper brand). Clear spray bottle (1 Pack, 2 Pack Sally's Organics)
Link to purchase in Canada: Amazon.ca (Similar, 2 Pack)
 
These spray bottles are 16oz - the perfect size for DIY cleaners. Initially I thought at 6 pack was going to be too many, but I quickly found uses for them. You can also just use the glass bottle and order alternative dispenser tops (I converted one of these into a dish soap dispenser by purchasing a pump).
 
Many wonder why I recommend the Amber color, and that is because many cleaning agents are UV sensitive (like hydrogen peroxide). If you would prefer clear then just be sure to store your bottles in a dark cabinet if they contain UV sensitive chemicals.