I'm now up to a 34 DDD and wearing 2 flimsy old sports bras under a pajama shirt with a really street pair of yoga pants to the gym (I'm not quite comfortable showing off my «bump» yet, I'm one of those gals who just looks thick around the middle) (rookiemoms.com)
All you need is an old sports bra and a pair of scissors. (pumpables.co)
I tried to make one of these by cutting holes into an old sports bra, for hands - free pumping. (romper.com)