Why some beer sold in Netherlands supermarket does not have statiegeld?

I'm confused.

Lidl sells Tripel Karmeliet (presumably made in Belgium) beer in 0.25 bottles in pack of 6 and in 0.33 cans in pack of 4.

Cans have statiegeld added, it says it on shelf price label and on receipt, but bottles don't.

Why bottles don't have it?

(Yes, I did carry whole bag of them back to the shop like an idiot. No, they were not accepted by machine)