All our Straw Toppers / Dust Caps are made from Silicone.
 
They measure approximately 8mm, making these the most universal fitting for most Cold Cups and Beer Can Straws.
 
PLEASE NOTE!
These are a novelty item and not a toy!!  Not recommended for under the age of 3 years.
 
Please see our straws too to add that bit of extra to your cold cups and straw toppers!!