keatsan, as always top up something of rm1/2 value to swipe card or use voucher
just go to groceries category and start from lowest price

i dun know why when many people ask this question, some other fellas always say photobook or some plasticky items that once buy and put aside,

really not practical lo

should always buy something consumables , especially foods, in terms of snacks, biscuits, should last longer if expiry date ok

like in lowest priced groceries, the 2 tiger biscuits are the best candidates in my opinion, 60g biscuits at rm0.90/1.0 are possibly reasonable, buy2 or more in quantity if needed more for minimum purchase, they are fulfilled by lazada and shipping are absolutely free

please dun get those from tesco, usually comes with exorbitant shipping charges 

further up in value, you can get oreo or twisties, up to you