Well designed and very convenient. I keep several in my refrigerator so they ready to go when needed. Also great for traveling. You can bring an empty one to the airport and then fill when you are inside security.

I bought both the 500 and 750ml bottles for a recent backpacking trip and they held up great over the 20 miles. I love the ring that you can use to carabineer to your pack! The 500ml is the perfect size for a Liquid IV for extra hydration while hiking. I really appreciate that I can just bite down on the valve and take a sip without having to touch it. Definitely recommend!

I'me sold on Mazama! You can't beat their customer service or their products. I own three bladders for all of my packs and two 500 ml and one 750 ml film bottles. The bottles are great for hydration when using Nuum tablets because the whole tablet fits through the top neck. The bladders are the best that I have used. Overall this company rocks! They stand behind their products and have great customer service. AAA

Fits well in a drop-in ski jacket, and it's easy to use when skiing.

The 750ml Film Bottle is great! I took it out on a 30 mile Highlander backpacking tour around Big Bear Lake recently. I use it as my hydration bottle to supplement my main water supply. I love that a whole tablet of Nuum will fit through the top of the bottle. When done, it rolls up and can be stowed into a hip belt pocket. I highly recommend this bottle. Mazama, you rock!!

I like the bottle. Please make an extra large version and send coupons. It went on sale 2 days after I bought it.