Beside above, when should I buy Halloween costumes? Also, bring an extra long straw if you are planning on wearing this to a Halloween party. Although being a showstopper this isn’t the most mobile costume, and you may need to plan an extra five minutes if you are walking anywhere. If you are wanting to be the hit of the night, this is absolutely the costume for you. The AA batteries that come with the costume should last you the whole night, but bring a spare set just incase.