1) The quick answer
One 30 mL Hospira bacteriostatic water bottle reconstitutes:
- 30 vials at 1 mL BAC per vial
- 15 vials at 2 mL BAC per vial — the most common configuration
- 10 vials at 3 mL BAC per vial
- 6 vials at 5 mL BAC per vial
Math: 30 mL bottle ÷ mL per vial = vials reconstituted. The constraint is the labeled 28-day in-use period after first puncture — Hospira's labeling covers those 15 reconstitutions within 4 weeks under refrigeration.
2) Vials per bottle by BAC amount
| BAC mL per vial | Vials per 30 mL bottle | Common use |
|---|---|---|
| 1 mL | 30 vials | IGF-1 LR3, micro-doses |
| 2 mL | 15 vials | Semaglutide, Tirzepatide, BPC-157, most peptides |
| 3 mL | 10 vials | GHK-Cu, Sermorelin, Semax (large vials) |
| 5 mL | 6 vials | TB-500, Thymosin α-1, KPV (lower concentration) |
3) Per-peptide reference table
Below is the standard reconstitution amount for the 26 peptides in the free calculator's preset list, plus how many vials of each one bottle reconstitutes:
| Peptide | Standard BAC | Vials per 30 mL bottle |
|---|---|---|
| Semaglutide (5 mg) | 2 mL | 15 |
| Tirzepatide (10 mg) | 2 mL | 15 |
| Retatrutide (10 mg) | 2 mL | 15 |
| Cagrilintide (10 mg) | 2 mL | 15 |
| BPC-157 (5 mg) | 2 mL | 15 |
| TB-500 (10 mg) | 2 mL | 15 |
| CJC-1295 (5 mg) | 2 mL | 15 |
| Ipamorelin (5 mg) | 2 mL | 15 |
| GHK-Cu (50 mg) | 3 mL | 10 |
| GHRP-6 (5 mg) | 2 mL | 15 |
| LL-37 (5 mg) | 2 mL | 15 |
| IGF-1 LR3 (1 mg) | 1 mL | 30 |
| PT-141 (10 mg) | 2 mL | 15 |
| Melanotan II (10 mg) | 2 mL | 15 |
| Tesamorelin (10 mg) | 2 mL | 15 |
| Sermorelin (15 mg) | 3 mL | 10 |
| Epitalon (50 mg) | 5 mL | 6 |
| Thymosin α-1 (10 mg) | 5 mL | 6 |
| AOD-9604 (5 mg) | 2 mL | 15 |
| MOTS-c (10 mg) | 2 mL | 15 |
| Selank (5 mg) | 2 mL | 15 |
| KPV (10 mg) | 5 mL | 6 |
| DSIP (5 mg) | 2 mL | 15 |
| Semax (30 mg) | 3 mL | 10 |
TRT (testosterone) isn't reconstituted — it ships pre-mixed in oil at 200 or 250 mg/mL, no BAC water needed. The 30 mL Hospira bottle is for water-reconstituted lyophilized peptides only.
4) The 28-day in-use math
Hospira's package insert specifies a 28-day in-use period after first puncture under refrigeration. The 0.9% benzyl alcohol preservative inhibits microbial growth across that window; sterility assurance is not covered by the manufacturer's labeling beyond it.
A 30 mL bottle reconstituting 15 vials at 2 mL each is fully utilized only when all 15 reconstitutions occur within those 4 weeks. Documented usage scenarios:
- Weekly GLP-1 use: One vial of semaglutide or tirzepatide typically lasts ~4 weeks of injections, so reconstitution occurs monthly. 2 mL per month from a 30 mL bottle — the labeled in-use period ends before the bottle is finished. Smaller bottles (10 mL Hospira) match this rate more closely.
- Daily peptide stack (BPC-157 + TB-500): 2 vials reconstituted at a time, each lasting ~4 weeks. 4 mL per cycle — 4–8 mL of the bottle is used within the 28-day window, with 22+ mL remaining at expiration.
- Multi-peptide protocol with multiple users: Reconstituting 8–15 different vials within 4 weeks. This is the documented usage profile in which a 30 mL bottle is fully utilized.
For solo weekly GLP-1 use, a 10 mL Hospira bottle (5 reconstitutions of capacity) more closely matches the documented usage rate and carries only marginally higher per-mL cost.
5) Cost per reconstitution
Hospira 30 mL BAC water typically retails for $4 to $8 from research-supply pharmacies and cash-pay sources. At 15 reconstitutions per bottle (2 mL each), that's:
- $4 bottle: $0.27 per reconstitution
- $6 bottle: $0.40 per reconstitution
- $8 bottle: $0.53 per reconstitution
When usage rate leaves half the bottle unused at the 28-day boundary (the solo-user profile), the effective cost-per-use roughly doubles. Documented purchasing patterns for single-peptide weekly use generally reference smaller (10 mL) bottles as more closely matched to consumption.
6) One bottle across multiple peptides
A 30 mL bottle is documented as multi-dose-capable across its 28-day in-use window. The two practices documented in pharmacy literature for multi-vial reuse:
- A fresh sterile syringe per draw. Cross-contamination is the documented risk — the diluent itself is not peptide-specific, but a syringe that has contacted one peptide vial introduces residual peptide and trace solvents into the source if re-inserted.
- One-direction flow. Once diluent has entered a peptide vial, returning any portion to the source bottle is documented as a contamination route. Standard practice is single-use of each syringe along one direction of flow.
Documented multi-peptide use of a single 30 mL bottle over 28 days:
- Day 1: Reconstitute Tirzepatide 10 mg + 2 mL BAC = 5 mg/mL solution
- Day 1: Reconstitute BPC-157 5 mg + 2 mL BAC = 2.5 mg/mL solution
- Day 8: Reconstitute new BPC-157 vial + 2 mL BAC (last vial finished)
- Day 14: Reconstitute Ipamorelin 5 mg + 2 mL BAC
- Day 21: Reconstitute new Tirzepatide vial + 2 mL BAC
- Day 22: Reconstitute new BPC-157 vial + 2 mL BAC
Total used: 12 mL. Bottle has 18 mL remaining when 28 days elapse. Documented usage patterns indicate that even moderately active multi-peptide profiles typically have 30–60% of a 30 mL bottle unused at the in-use boundary.
7) Bottle size matched to documented usage profiles
Documented usage-to-format match:
- Solo user, single weekly peptide (e.g., Tirzepatide alone): 10 mL Hospira bottles match this rate. One bottle per month, discarded at the in-use boundary.
- Stacking 2–3 peptides daily: One 30 mL bottle per 28-day cycle. Documented utilization typically 60–80%.
- Multi-user household sharing protocols: 30 mL is the documented format-fit when 2+ users are reconstituting. Standard pharmacy practice references separate sterile syringes per draw.
- Bulk reconstitution session: 30 mL is documented as suitable when 8+ vials are reconstituted at once and refrigerated. Each reconstituted vial then carries its own ~28-day in-use period.
8) Documented storage profile between uses
The storage profile documented in Hospira's labeling and standard pharmacy references:
- Refrigeration at 2–8°C following first puncture. Room-temperature storage is documented as roughly halving the practical in-use window.
- Puncture date marking on the bottle is the standard tracking practice. Day 1 = puncture day; day 28 = the labeled in-use boundary.
- Upright orientation keeps the rubber stopper sealed in storage.
- Alcohol-pad wipe of the stopper before each puncture is the documented hygiene practice, even on a preserved bottle.
- No freezing. Manufacturer literature documents freezing as a source of seal damage and preservative crystallization.
For broader peptide-storage details, see the peptide storage guide covering reconstituted vials and powder vials separately.
9) Frequently asked questions
How many peptide vials does a 30 mL Hospira BAC water bottle reconstitute?
It depends on how much BAC you add per vial. At 2 mL per vial (the standard for most GLP-1 and 5 mg peptides), one 30 mL bottle reconstitutes exactly 15 vials. At 3 mL per vial: 10 vials. At 5 mL per vial: 6 vials. At 1 mL per vial: up to 30 vials.
How long does a 30 mL Hospira BAC water bottle last after first use?
Hospira's labeling specifies a 28-day in-use period after first puncture under refrigeration. The 0.9% benzyl alcohol preservative inhibits microbial growth across that window; sterility assurance is not covered beyond it. The standard tracking practice is marking the puncture date on the bottle.
Is a 30 mL bottle documented for use across multiple peptides?
Yes — a 30 mL bottle is labeled for multi-dose use across 10–15 different peptide vials within its 28-day in-use window. Standard pharmacy practice references a fresh sterile syringe per draw and one-direction flow (no re-insertion of used syringes back into the source bottle).
What is the cost per reconstitution from a 30 mL Hospira bottle?
A 30 mL Hospira bottle typically retails for $4–8 from documented commercial sources. At 15 reconstitutions per bottle (2 mL each), that's $0.27–0.53 per vial reconstitution. Documented purchasing patterns reference smaller bottles for usage rates that don't fully consume a 30 mL within the 28-day in-use period.
Is 2 mL or 5 mL of BAC water more common per peptide vial?
2 mL is the more commonly documented volume because the math is cleaner and the resulting concentration typically fits a 1 mL U100 syringe. 5 mL produces lower concentration (referenced for very small target doses) but uses BAC water faster — documented at 6 vials per 30 mL bottle. The free GLP1 Calculator shows which volume corresponds to a given peptide and target dose.