summer, the VIP Vapor Cig carto punches is prob the best you can get but if you want something simple, quick and cheap to use as a back up get the saddle valve.
Shop Watts 1/4" Brass Self-Tapping Saddle Valve at Lowes.com
OR
http://www.lowes.com/ProductDisplay?partNumber=17544-59288-98520LF&langId=-1&storeId=10151&productId=3190599&catalogId=10051&cmRelshp=req&rel=nofollow&cId=PDIO1
Shop Watts 1/4" Brass Self-Tapping Saddle Valve at Lowes.com
OR
http://www.lowes.com/ProductDisplay?partNumber=17544-59288-98520LF&langId=-1&storeId=10151&productId=3190599&catalogId=10051&cmRelshp=req&rel=nofollow&cId=PDIO1
