I stole a little head pillow for the head in an airplane and put it under my belly during night time to hold it. It was great. And cheap ;-)
And to beastfeed my husband bought be this pillow which is doing a 90? angle in Jusco (Taikoo Shin MTR) for less than 150HK$, I used it untill I stopped breasfeeding and then my baby used it when he didn't stay steated to prevent him to fall.