<b>Choose from 2 Sizes: </b><br><br><b>- SIZE 1: Fits 12 to 24 oz Bottles: </b><br>12 oz Standard Mouth bottle<br>12 oz Wide Mouth bottle<br>16 oz Wide Mouth bottle<br>18 oz Standard Mouth bottle<br>18 oz Wide Mouth bottle<br>20 oz Wide Mouth bottle<br> 21 oz Standard Mouth bottle<br> 24 oz Standard Mouth bottle<br><br><br><b>- SIZE 2: Fits 32 oz and 40 oz Bottles: </b><br>32 oz Wide Mouth bottle<br>40 oz Wide Mouth bottle