This is a FEQ straw set made by THERMOS. I bought it as a spare for my child's water bottle and kept it without using it. Since it's for a water bottle from quite a while ago, please check the compatible model numbers. Although it's unused, please understand that it has been stored at home before purchasing. Compatible model numbers are all FEP and FEQ models. - Brand: THERMOS - Model Name: FEQ Straw Set - Contents: Straw, mouthpiece - Manufacturer: Thermos K.K. Thank you for looking.