thriftier
adj. 節儉的( thrifty的比較級 ); 節約的; 茁壯的; 茂盛的
If you say that someone is thrifty, you are praising them for saving money, not buying unnecessary things, and not wasting things.
My mother taught me to be thrifty.
我媽媽教我生活要節儉。
...thrifty shoppers.
花錢精打細算的購物者