Consider a few things before choosing a container...
1. Cost: If you need 1 or 2 containers, then a penny here or there isn't going to make a huge difference. But if you need 100, 5 cents can change your mind very quickly. Shop around - take into consideration shipping costs and whether you need to buy caps separately - before buying.
2. Product functionality: A toner is going to leak out of your malibu or tottle bottle, and a pump bottle isn't the best choice for a thick sugar scrub.
3. Usage by humans: Consider you're going to use your product. Will you use it in a slippery shower with wet hands or leave it in a purse for days on end? How much shelf or night-side table space do you want to give up to this product? Are you going to be going back for more or will you be able to apply enough with one squirt or pump? Is there another way to apply this product?
I like to package my sugar scrubs in a low profile jar. I started using them because someone gave me a few and I found it mad it easier to get into the product and get a lot of it when I was in the shower.
And I stopped packaging my foot lotion in the malibu containers because I realized I was always going back for more after the first application, but my hands were really sticky and greasy and it made getting the product out a pain in the bum. Plus the container was then really sticky and greasy. So I switched to a pump bottle - it's a little more expensive, but I can put it in a really big pump bottle, and I don't make my normal horrible mess.
4. Prettiness: This is always a factor. If I'm making my 1 litre of leave in conditioner, I'm going to choose something functional for storage. But when I give it to someone, I want to have a lovely bottle that shows off the contents. I need to apply labels, so I need something that is going to be fairly normal shaped so the labels don't warp or buckle.
The adjunct to prettiness is perception. Take these two bottles - the one on the right is a 250 ml cosmo oval bottle. The one on the left is a 500 ml Boston round. Now if you pick them up, you'll know the Boston round is heavier and larger than the other. But just sitting on a shelf, it may appear that one costs more than the other but is slightly smaller!
5. Interchangeability: When I'm buying a larger number of bottles, I consider if the caps are interchangeable with other bottles because I never know if I want a disc cap, turret, spray, or pump cap.
6. Your ingredients: Essential and fragrance oils are not going to play nice with many plastics. You've no doubt noticed this! They're fine in small quantities, but if you're making a fancy perfume or roll on that contains - say - 20% fragrance or essential oils, considering using glass instead. (We'll get into this more tomorrow...)
7. Brand unity: If you're selling things, you might have a specific colour, size, or shape that says you!
I like the cosmo oval bottle for most applications. It's not very costly, and I like the look of it because it's nice and tall and shows off the clarity of a surfactant system nicely, although it also highlights when it's not so clear! It fits nicely in my hand when I'm using it as a spray. And I find it works well in the shower when I need to squeeze out the last drop of body wash with slippery hands! I find it easy to change the caps around when I need something different, and they store well in the giant box I use to store bottles. (Anyone have a system for storing bottles? They take up so much room!)
I like the tottle bottle for in shower body wash or shampoo, and lotions where I won't be needing to apply more after the first dose.
Sizewise, I find I use 4 oz bottles and jars the most (although I like sugar scrubs in 8 oz containers so I can go crazy with it in the shower!) because I tend to like to change out scents and ingredients. Four ounces is a nice size for a body wash for a few weeks or for hand lotion for a few months. (And I find a 4 oz leave in conditioner is a very good size - any larger than that, and I tend to drop it regularly. But then again, I am a serious klutz!)
Here's a great post on the CPS blog - 5 packaging know-hows! A good read if you are thinking about how to package yourself for sales!
Finally...storage. I have no idea how to store bottles well. I keep them in bags and boxes and everywhere I have space. You'll want to keep them in a safe place where they won't be covered in dust and spiders (EEEEK!!!!) and you'll want to keep them handy so you can do an occasional inventory before creating something - 'cause there's nothing worse than finding out the only bottles you have on hand are tiny 2 ounces with sprays for a sugar scrub!
What kind of bottles do you love or hate? Any ideas on how I could be less messy with the storage?