Reddit mentions of Honey-Can-Do Stainless Steel Spray Bottle, 14 oz

Damn, what the hell, that's forever.

Let me link you my chain management tool kit that makes this take about 15 minutes. One moment.

Edit:

360-degree chain brush for $9

Metal spray bottle to put kerosene in to clean down chain for $4

GreaseNinja to apply chain lube directly for $15

Folding portable rear stand for $40

I throw that all, a piece of old t-shirt, and a can of my favorite chain lube (I use Motul Factory Line wax) in my tank bag for longer trips. I can do my whole chain in 5 minutes for the clean and application, it takes a few minutes longer to adjust tension if needed. You shouldn't need to adjust your chain more often than every thousand miles or more once your brand-new chain gets done with it's initial stretching.

Edit edit: CanyonChasers has a great video on how to clean a chain properly, if you want a link to YouTube I'll get you that. Spray the rear sprocket area when cleaning the chain, gets the sprocket clean and reduces overspray on your rear tire.

You should be able to find it in a can at the grocery store. I'm a bit of a purist though, and I like really good olive oil that you'll never find in a spray can.

Anyway, Amazon has tons of options. It doesn't have to be specifically for oil, most food-grade sprayers will work:

http://www.amazon.com/Misto-Brushed-Aluminum-Olive-Sprayer/dp/B00004SPZV

http://www.amazon.com/Lifetime-Brands-Misto-Oil-Sprayer/dp/B008C9UA9W

http://www.amazon.com/Norpro-Stainless-Steel-Sprayer-Mister/dp/B000SSW6TM

http://www.amazon.com/Trigger-Spray-Bottle-Cooking-18-Ounce/dp/B00FMXG8XI

http://www.amazon.com/Misto-Gourmet-Olive-Sprayer-Silver/dp/B009I5U3GY

http://www.amazon.com/Steven-Raichlen-Barbecue-Marinade-Bottle/dp/B003FZAVWO

http://www.amazon.com/24-Oz-Sprayer-Bottles-Pack/dp/B00008VXNE

http://www.amazon.com/Honey-Can-Do-KCH-01085-Stainless-Bottle-14-Ounce/dp/B007ZSJ3X0