A combination of putting a finger inside the cup and the sound it makes when pouring.

Putting a finger inside its not as hard as one would think

You mean you can't pour without looking? Amateur.

I use metal straws. I'll fill my container and stick the straw in, pull it out and feel where the fill level is. I've also put notches on my straws for measuring certain container I own. A notch for one cup, half cup, etc. It works with liquids or wet foods.

Your link is incomplete and unclickable.

A device already exists for this. It sits on the edge of your container and beeps when it's almost full. They're under $20, boom, problem solved.

I’m always over filling my tea cup, I don’t know how many times I’ve spilled the kettle water on my hands.

Yes! One of my childrenalways gets a bigger slice. I need one of those things are used to use in math to make a circle, I forgot the name do you know what I’m talking about?

We already have liquid level indicators, which emits a beeping sound when the cup's almost full.What would be so different about your product?

Well to be honest, my comments were very defensive and I want to apologize for that. Although everything I said is true still I am sorry. I said that because at the end of big schools they teach you to be independent and at the AFB schools they teach you to depend on blind people. I’ve worked at an ASP school and I learned at a NFB school this is how I know! Because I started cooking before I would blah and AN really do not use measuring cups it was unfair and rude of me to say I don’t need measuring cups for blind people. When it comes to liquid sighted people could probably use them. LOL! The thing I wish they would invent would be a pizza cutter for blind people. I always cut the pizza and have a dog Ganic base in a little piece every time! I am sorry I did not know what to say to help you but I do want to apologize that was very rude of me and I am sorry. Also, I am sorry for the grammatical errors in this comment after dictating it I could not go back and fix it I don’t have the time but most things are self-explanatory feel free to ask me anything I’ll be glad to answer your questions but as far as advice I cannot think of anything. Have a great day!

My dad uses a funnel.

I have been blind since 1992 at the age of 19. I cook, wash clothes and clean my house with no assistance. I have fun whatever it is you’re a test thing to be ridiculous. As I bake cakes, pies, brownies and I even make my kids smoothies in the morning. I don’t know who would buy this as none of my visually challenged Friends would use measuring utensils for blind people. When I make my husbands coffee or use a regular measuring cup or a tablespoon. I don’t think this will make much money. Because blind people who want to cook already do. I guess you could give them to people that belong to the American Federation for the blind but I don’t think any self-respecting Federation of the blind member would use this. Good luck though!

I’ll check them out

I use mugs that are beveled or curve around the area where I should stop pouring and I don’t use glasses if I’m pouring the drink myself.

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Ill give it a look