I wouldn't worry too much about it breaking in your pocket. Phiniac has videos of them testing out their tank by dropping and throwing it at walls and the like without it breaking.
I did break one of my pyrex
tanks for my AGA-T2 but it was the china-cilicate glass so its quality is more than likely lower than some vendors' glass. It didn't even catastrophically break, but it has a hairline running from top to bottom and a tiny chunk came out, making the bottom edge super rough (IE could cut o-rings), so I've retired it.