I used to carry a plastic water bottle and a takeaway plastic container in a supermarket carry bag.
Such a palaver whenever I tried to give my dog a drink during our walks. My dog takes two licks and then thinks the takeaway container is a toy and bites it away from me so I can chase him!
This is very well made and does not leak at all. It will last a very long time. I had to buy the sling to carry it as I was still walking around with a supermarket plastic bag.
My dog happily drinks from the specially formed cap as does other dogs in the vicinity.
The only gripe I have is that it is expensive when you add the cost of the sling to the price and I think a cheaper packaged deal with the sling would have made it better value for money hence 4 stars.