Silicone seal set 1.0

How to tell if you need a 1.0 seal:

You already have a bottle:
-The tongue of your silicone seal is not ribbed .
-The engraving on the bottom of the bottle does not say "2.0" .

You want to order a new bottle with replacement seals:
-The product title of the bottle you want to buy does not say 2.0.