The Richell S-8 straw set is made of silicone that can withstand up to 140°C, and comes in a set of 2. - Brand: Richell - Model: S-8 - Type: Straw set - Material: Silicone - Temperature Range: 140°C - 20°C - Set Contents: 2 sets I am selling this because I ordered the wrong size. It's brand new and unused, having just arrived last week. The box will be oversized if I send it as is, so I will take it out of the box and ship it. (I will include the folded box.) Thank you for looking.