Not sure what's "anti-bacterial technology at inner wall" but it might be the reason for the aftertaste I got after a couple of uses. After I received it I gave it a thoughtful wash and everything was fine, no aftertaste. It was only used with water. After a couple of uses out in the sun, it started to have a plastic aftertaste even when I drunk straight from the bottle without the cap.
Otherwise it's ok, no dripping, plastic parts looks durable.
Hi,guy,could you please send some photos and your order number by email to"firstname.lastname@example.org"? and we will check it.thank you for buying.