its fine that they are stretching.. i am putting them in 20oz bottles over the weekend... i am working on making like a hydro soil system... a drain reservoir and a food res. its hard for me to explain what i am talking about, but as soon as i get shit going i will be sure to post piks... but yeah strtching is fine... those cups are like 3 inches tall... the bottles i will be using are vitamin water bottles... they are alot taller... they are 7.5" tall, so all the stretching will be buried up till the first node... just trust me on this... i havent really had time to get what i want done, or the supplies for that matter... this weekend will be the one...