What a vape cartridge is
A vape cartridge — a "cart" — is a small glass or plastic chamber filled with cannabis oil, sealed at the bottom with a heating coil and a 510-thread connector. It screws onto a battery (or a disposable pen has the battery built in), the battery heats the coil, the coil vaporizes the oil, and the user inhales the vapor.
On the shelf, two carts can look identical and contain very different oil. The label says which.
The three main oil types
Most carts on a Washington dispensary shelf fall into one of three categories.
### Distillate carts
The most common and the cheapest. Distillate is THC isolated from the rest of the cannabis plant — refined down to 80-95% pure THC and almost no terpenes. To give the cart flavor, producers re-add terpenes after the fact: either cannabis-derived terpenes (CDT) recovered during extraction, or botanical terpenes from other plants (limonene from citrus, myrcene from hops, etc.).
- Strong — total THC runs 75-90%.
- Cheap — usually the lowest per-gram price in the cart case.
- Flavor leans neutral — the re-added terpenes carry the flavor; some carts taste close to a candy or a fruit, less like cannabis.
- Effect leans flat — without the full terpene profile, distillate tends to feel more uniformly "high" across strains. Less of the variation between an indica and a sativa carries through.
### Live resin carts
Live resin oil from fresh-frozen cannabis (see the rosin-vs-resin explainer) loaded into a cart. The oil is full-spectrum — the cannabinoid and terpene profile of the source strain is preserved.
- Mid-strength — total THC runs 70-85%, slightly lower than distillate because some weight is real terpenes instead of THC.
- More expensive than distillate — usually $5-15 more per cart.
- Flavor matches the strain — if it’s a Blue Dream live resin cart, it tastes like Blue Dream flower vaped.
- Strain experience shows through — the indica/sativa/hybrid pattern lands more recognizably than with distillate.
### Live rosin carts
The top tier and the most expensive. Live rosin (see the rosin-vs-resin explainer) loaded into a cart. Same full-spectrum profile as live resin, with no solvent ever involved in the extraction.
- Mid-strength — similar range to live resin, 65-80% total THC.
- Top of the cart-price range — often double the price of a distillate cart of the same size.
- Strongest flavor preservation — most accurate to the source strain.
- Smallest market share — yield economics keep volume low.
Hardware: the cart and the battery
The cart side has two pieces worth knowing about:
- 510-thread connector — the screw-thread standard most carts use. Any 510 battery fits any 510 cart.
- Coil material — ceramic coils are the current default. Cotton-wick coils still exist but burn faster and tend to taste burnt sooner. Ceramic is what we usually steer customers toward.
The battery side:
- Variable voltage — most batteries have three or four heat settings. Lower voltage gives a cleaner-tasting hit; higher voltage gives a bigger cloud but burns through oil faster.
- Preheat function — a soft pre-warm that helps cold or thick oil flow before a draw. Useful in winter or with rosin carts.
- Battery life — a full battery usually lasts a couple of days of moderate use.
Disposable vapes have the battery built in and discard when empty. Refillable batteries with a separate cart cost less over time and produce less e-waste.
Reading the cart label
Three numbers and one name on every label tell you most of what you need:
- Oil type — Distillate, Live Resin, Live Rosin, or Cured Resin. The biggest single label-read.
- Strain — single-strain (Blue Dream, Wedding Cake) or blend (often "Indica Blend," "Sativa Blend").
- Total THC % — the potency. Higher isn’t always better; live resin and live rosin trade some THC % for terpenes.
- Producer name — the licensed Washington company. Some producers have a long track record on carts specifically; we can tell you who we’ve stocked the longest.
The COA carries everything else — terpene panel, residual solvents (especially relevant for live resin), heavy metals (matters for the cart hardware as much as the oil).
What to pick when
The most common reasons customers pick one type over another:
- You want the cheapest reliable cart → distillate from a producer with a clean COA.
- You want the strain on the label to actually taste and feel like that strain → live resin.
- You want maximum flavor and budget isn’t the constraint → live rosin.
- You want a discreet, portable format with onset like smoking → any of the three; the format matters more than the oil type for portability.
A note on cart safety
Cart safety is mostly about the COA — residual solvents (live resin), heavy metals (any cart, comes from the hardware), and the pesticide panel. The 2019 EVALI illness cluster traced to unlicensed-market carts cut with vitamin E acetate; regulated Washington carts are tested for it and ND on the panel is the safety floor. Buying carts from a licensed dispensary that pulls COAs on request is the cleanest safety move.
