This is what I use, it’s pretty good and I slide it under my bed. https://www.amazon.com/Vaultz-Locking-Storage-Inches-VZ00458/dp/B00I0HREBI/ref=pd_aw_fbt_img_3/139-2146243-4063213?_encoding=UTF8&pd_rd_i=B00I0HREBI&pd_rd_r=a1219119-352e-11e9-ba30-47bcd36847ea&pd_rd_w=BK4bY&pd_rd_wg=iyAnD&pf_rd_p=b98fa1a4-6e6e-4981-835c-7fb29e0f4dd2&pf_rd_r=1HQV4TP2CXSGY6CGWR2C&psc=1&refRID=1HQV4TP2CXSGY6CGWR2C