Corning 100ml media bottles can be had for $10.27 each on Amazon as well, but one has to spend $35.00 to get free shipping.
With that said, anyone who is thinking about purchasing media bottles should think about purchasing a minimum of 10 (which is a case when ordering 100ml media bottles). It does make sense to prepare sterile starter media one bottle at a time. I purchased my media bottles from Capitol Scientific. I believe that I paid about $15.00 in shipping. The Corning number for 100ml media bottles is 1395-100. The 1395 part of the number is the type of glassware, which is media bottle in this case. The 100 is the volume of this type of glassware.http://www.capitolscientific.com/Corning-1395-100-PYREX-100mL-Round-Media-Bottles-with-GL45-Screw-Cap-Graduated