How to ensure my plastic bottle is manufactured to the best quality? tritan material + custom mold + Question regarding plastic thickness

How to ensure my plastic bottle is manufactured to the best quality? tritan material + custom mold + Question regarding plastic thickness

Hi all,

I was referred to this subreddit via my post on /r/entrepreneur (for those that want to see:https://www.reddit.com/r/Entrepreneur/comments/5le9lj/anyone_here_have_experience_with_plastic_molds/)

Anyways, I feel that I have found a good manufacturer in terms of price. However, I would like the guidance of you all in helping me ensure that my bottle is made to the best quality.

I designed a water bottle with a unique design (dumbbell shaped) that can hold up to a gallon of water. The material I want it made from is Tritan, since Tritan is supposedly the best BPA-free impact resistant plastic. Based on my design, the company will be producing a new mold for me. However, one thing they are unsure of is the thickness of the bottle.

My bottle needs to be relatively thick because it will be used in harsh environments where it may fall. I need the bottle to be able to withstand such falls and not crack or break or leak, especially when it is filled with a gallon of water.

*My question to you all is, how thick is the plastic on a traditional water bottle (let’s say CamelBak, is it roughly 1.5mm)? Is there a certain thickness for my bottle you can recommend so that it meets my requirements to be more durable? *

Additionally, do you recommend the cap of my bottle to be Tritan also, or some other sort of material like polypropylene? I need the best durability, impact resistance, and leak proof plastic possible for this product.

Also, is there any significant pros or cons with utilizing blowing vs injection molding? Most manufacturers I talked to said it would be best to construct my bottle via blowing.

If someone can help me out with these questions, that would be great. I can also send some pics to you if you need to see to get a better understanding.

I look forward in hearing back. Thanks in advance! 🙂

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as far as making your bottle out of tritan, you really have to abuse the thing to get any measurable bpa from traditional pc. bpa scares are like the gluten industry. it is literally scare tactics. anyway… I’m sure your design is great, but just in case it isnt, lets go over some basics. You’re making a reusable water bottle,

How easy will it be to clean? Who are you selling to? What is your price point? How soon are you looking to make back your initial tooling investment? (in units sold) How are you packaging it?

Those questions are critical to your success. if you have to buy 10k worth of tooling, you might be pissed when you dont make that back in 100 units sold. If its going to be reusable, it needs to appear to be easy to clean in its packaging.

now for the bottle thickness. It is totally up to you, but you might want to select your material based on real world results. Test, test test. buy sheets of material if you need to. buy other peoples bottles and destroy them. if you are the newcomer to the industry, you should have a great understanding of why your competition is successful. bottle design? packaging? market? price?

Last but not least, listen to your molder and tool designer. most engineers in this industry are borderline autistic assholes, but they are also right a lot. if they say you need thicker, thinner, different, dimensions, etc, then you need to assume they know more than you do about this particular subject.


I really appreciate your insight and will use it in my research accordingly. Thank you sir.

Wait….So BPA really is just a scare tactic? So I can use a polycarbonate plastic as the material for my water bottle and people won’t get harmed by it? My mind honestly is blown if this is true.

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Who are you selling to? If bpa matters to them, you’ll sell more by catering to their needs. My 2c is that bpa is not released under regular use. Look into it, find out how many ppm is dangerous and how much can be released. Look at whether dishwashers will heat the bottle hot enough to expedite the breakdown of plastic compounds. Look at effects when exposed. You’ve got to crack a book if you’re thinking of launching a product to consumers. You can give them bpa free because it sells. You can give them something cheaper if that’s your market too. Ultimately it’s your call.


This is 100 percent on target. It doesn’t really matter what the science is, to be honest. Find which niche you want to fill and press hard on it. Some people care about bpa shit, others don’t. You can sell to either market, depending on the size and demographics and your own abilities one or the other will be more profitable.

Also please make sure that you have a marketing plan that’s not just cross your fingers and hope a better product sells. The world is littered with companies who made a better widget for cheaper and went out of business because people didn’t know.