Rumor has it this will be coming soon in bottles. Is currently on draft for pours and growler fills at Growler USA on 29th St for those interested. 32oz and 64, pricey tho.
I love PHP Lamar, but they really need a better way to update people on their tap-list. They're not on taphunter, they don't have a live-feed of the tap list up for the South Lamar location on their website (only Burnet) and do very little in the way of updating social media in regards to what's currently available. Beers in the vein of Viet Speedway being on draft can end up drawing a lot of people out.
I was not allowed a 32oz growler fill at PHP, even by just paying for multiple glasses. So I got a single glass, and a couple growlers of ipas.
Sorry I didn't see this earlier, got a little busy today but I unfortunately wouldn't have been able to answer anyway -- I just got a glass myself and didn't even ask about filling a growler. Hope you enjoy those IPAs, they are always pretty damn good