I’m not sure how that would happen - I used a standard water bottle with a screw cap with no problems.
But I guess overcarbing can happen with any bottle. YMMV so exercise reasonable care.
Carbonation has never been an issue before, this is the first batch that does.
I use 2 domino sugar cubes (1/2 teaspoons each) for a 22 oz glass bottle.
Carbonation is either right on, or a tad too much. I dislike plastic/pet bottles,
discarded them a while ago.
Variables
1. First batch using lager W-34/70 yeast
2. First time using yeast so close to expiration (4 months to go)
3. First under pitch (slightly) by manufacturers recommendations
4. First time using Epiphany malts