PUBLIX B&M Publix Brand 2 liter Soda/Mixers/Seltzer 50c ea wyb 2, also 75c back on IBOTTA
PUBLIX (confirmed in FL) has their store brand full line of 2 liter sodas/mixers/seltzers on sale BOGO at 99c, NO LIMIT.
Additionally there is a 75/1 any item IBOTTA offer at PUBLIX (ymmv on all accounts). With this offer you can get 2, two liters for 24c plus tax. ends when you current sales week ends (varies by area)
NOTE Two Liter Seltzer is found on water aisle in many stores not with main soda displays.