Okllen 15 Pack Rain Gauge, 1.5"/3.5CM Sprinkler Gauge with Wide Mouth, Outdoor Water Measuring Tool for Lawn, Garden, Yard, Bright Yellow, Transparent, Zero is 1/4" from The Bottom

Great Value. Sturdy Plastic. Great For Lawn Watering / Sprinklers. Will degrade if left for lengthy times in the sun. Place in lawn, water, go out and measure, retrieve and store.

The item has an updated scale from the picture. The cup is 1.5x1.5 inches or about 36 ml. At 18 ml of water the gauge shows half an inch and at 36 ml the guage reads 1 inch.USPS lost the package, shipping was delayed but that's USPS' fault.

This is great to measure the amount of water you give sections of your lawn. Highly recommended

Pros: It's dirt cheap and you get fifteen of them.Cons: As you can see in the product shots, "zero" is about 1/4" from the bottom, so not accurate.If you cared, I guess you could fill two of them to zero, then dump one into the other and you would know how much water it takes to get to zero. Anyway, they work well enough, but you need to do some figurin' if you want an accurate number.

Love these things. It comes with a ton of them so if you lose things as often as I do, this is the way to go!