Pumping and work

Hi guys so I'm back out to work and due to the nature of my job unable to pump every 2-3 hours.

What I do is nurse my LO from one breast then pump off approx 5oz from the other. Drop my LO off to daycare then around midday pump again where I would usually get around 8-9oz at work.

I'm now getting around 6oz-7oz .

My LO drinks approx 20oz a day. Is there anyway that I can increase capacity.

I drink 2 litres of water during the day and .5 on a evening. I also eat oats every day.

Any other tips.

Would love exclusively breastfed until 6 months. LO currently at 3 months.