Simply crack & shake to activate our Variety Glow Go Straw. With every sip watch the built in glow stick move up and down! This glow straw is super fun but not meant for thick drinks like frozen cocktails and milkshakes. Each glowing straw is 9" and each pack comes with 25 variety glow straws. (green, blue, red, yellow, purple). Please order in increments of 1 pack.