Yes, we can merger smaller breast milk pouches that are 1oz-3oz portion sizes into a single pouch. For rehydration accuracy of for smaller powder quantities we recommend utilize a scale to measure your order amounts to take care not to order hydrate the liquid. Please note, orders that consist of smaller 1-2 oz pouch orders may require additional processing and pouch fees. Please contact us or call/ text 602-456-1492 for any questions prior to ordering. A BoobieJuice teammate will also call to confirm your order after placing.