The bladder material is made of lightweight but tough rubber. I don't think it'd puncture that easily.
The inside has a very smooth, glass-like feel. I think it'd clean easily.
Their customer service is AMAZING. Great people.
Have used these on multiple hikes now with no issues. Very reasonable pricing compared to other brands and good build quality.
These bladders have served us well so far and have been through numerous cleanings and refills since we bought them. Still no leaks!
Very good quality brings spare gasket set. Arrived much faster than expected.