Place it at the offer itself, then follow with a bruh reaction for the refusal and a short scream meme sting if the item gets used anyway. Keep it as the setup line only, with the response sounds doing the payoff work after.
About this sound
A short voice clip of Flowery saying try my mysterious glue, lasting about two seconds. The delivery is bright and teasing, which makes the odd invitation feel mischievous, funny and a little suspicious to hear. The line comes from Deltarune Chapter 5.