Bottle question

Missykisses85

This may be the stupid question of the day but bear with me.
On the tommee tippee bottles at the "2.75" ounce mark its all dots why?
Tried google got nothing:-(

secret214uWed28879

i read that all closer to nature tomee tippee bottles have dotted line on the scale at 80 ml to indicate the sufficient level of water to be used in the tomee tippee closer to natur electronic steam steriliser

secret214uWed28879

and 210 ml is for the microwave steriliser

secret214uWed28879

its a measurement for how much water to put

Missykisses85

Ohhh thanks!!!!!