Hydrapeak Combo Inserts

Your best-selling insert — and for good reason. These combo inserts keep your vials snug, sorted, and rattle-free inside your Hydrapeak thermos. Each insert holds 8 × 10ml vials plus 4 × 3ml vials, and you can pair one with a 20ct 3ml insert for even more room.
🐣 Fit guide: 32oz thermos = two full-size inserts • 25oz = one full-size insert + one topper • 18oz = one insert only. (Thermos not included.)