crude bubbly glass canteen?

[Kentuckiana Jones]

I haven't come across anything like this yet and everything I find online doesn't look this crude. Most of the canteens don't have handles and have a smaller uniform neck. Never seen this many bubbles in a glass piece. It measures roughly 5" by 5" by 2" and weighs approx. 11 oz.

 

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[HuntinDog]

Reminds me of the Mexican art glass from the 70's.
Used to see it in the tourist shops.