The Richell S-2 Straw Set is a replacement part for the Straw Mug 320. I accidentally bought the wrong one, so it's brand new. I'd be happy if someone could use it. The box is bulky, which makes shipping expensive, so I will ship it without the box. Please understand this before purchasing. ^_^ - Brand: Richell - Model Name: S-2 Straw Set - Compatible Product: B1435 - How to Use: Straws are replacement parts for the Straw Mug 320 - Contents: 2 straws