These straws fit plastic straws 0.29" (8mm) outside diameter

These will convert 20oz plastic straw to fit our plastic straw toppers, with 0.4" (10mm) outside diameter.
 
These silicone straw tips come in 10 colors, including Red, Green, Light Blue, Orange, Purple, Yellow, Black, White, Blue and Light Green. 
 
Great to use for identifing your cup clearly by the color of the straw tips.
 
Straw tips are made of quality silicone material, reliable and odorless, not easy to bend or tear, which will serve you for a long time; Please wash by hands before you use them for the first time.
 
Removable, Soft and Flexible, silicone straw tips are removable, the soft silicone material can protect your teeth and lips, and the flexible bending design allows you to lengthen your straws for a pleasant drinking experience.
 
Easy to cut if you want to make them shorter.
 
Colors may differ slightly from your computer.