I'm a HUGE fan of the IBTanked pyrex cartotanks.
IBTanked pyrex tanks - Review
For just under $25 you get attractive anodized aluminum end caps in your choice of colors and a heat-tempered pyrex glass tube. Should you wish, a matching anodized aluminum drip tip in a variety of shapes/styles. The optional cartotank refill rool works nearly as good as a Slap Yo Moma tool and can also double as a drip tip. Each tank is shipped in a "thingy", a plastic bottle with a special cap which can be used to prime the carto.
These tanks are available in your choice of four different diameters to fit any battery device you own: 15mm, 19mm, 22mm, or 25mm. The are also available in three different tank lengths: standard (35mm), XL (45mm), and a shorty size called the halfling.
Appropriate sized cartomizers are available on the website, punched or un-punched by Smoktech or Boge. A variety of inexpensive drip tips are available. Replacement glass tubes are available. Tanks can be decorated with custom glass paint for an additional charge.




